Document:

EX-4.4

 Exhibit 4.4 

SIERRA METALS INC. 
 Condensed Interim
Consolidated Financial Statements 
 For the three months ended March 31, 2017 

(unaudited) 

  

	
	 1 | Page

 May 11, 2017 

Management’s Responsibility for Financial Reporting 

Management is responsible for the preparation of the unaudited condensed interim consolidated financial statements. These consolidated interim financial
statements have been prepared in accordance with International Accounting Standard (“IAS”) 34, “Interim Financial Reporting” using accounting policies consistent with International Financial Reporting Standards (“IFRS”)
as issued by the International Accounting Standards Board (“IASB”) and Interpretations issued by the International Financial Reporting Interpretations Committee (“IFRIC”). 

The Board of Directors of the Company is responsible for ensuring that Management fulfills its responsibilities for financial reporting. The Board of
Directors carries out this responsibility through its Audit Committee, which is composed of three members. The committee meets various times during the year and at least once per year with the external auditors, with and without Management being
present, to review the financial statements and to discuss audit and internal control related matters. 
 The Audit Committee of the Board of
Directors approved the Company’s unaudited condensed interim consolidated financial statements. 
  

					
	 “Igor Gonzales”
	  		  	 “Ed Guimaraes”

	  Igor Gonzales
	  		  	  Ed Guimaraes

	  President and Chief Executive Officer
	  		  	  Chief Financial Officer

  

	
	
2 | Page

 Sierra Metals Inc. 

Condensed Interim Consolidated Statements of Financial Position 

As at March 31, 2017 and December 31, 2016 
 (In
thousands of United States dollars, unaudited) 
  
  

													
	 	 	Note	 	 	March 31, 2017	 	 	December 31, 2016	 
	 	 	 	 	 	$	 	 	$	 
		 				 	  
	  
	 
	 ASSETS
	 				 				 			
				
	 Current assets:
	 				 				 			
	 Cash and cash equivalents
	 				 	 	37,959	 	 	 	42,145	 
	 Trade and other receivables
	 	 	4	 	 	 	27,083	 	 	 	17,854	 
	 Income tax receivable
	 				 	 	305	 	 	 	281	 
	 Prepaid expenses
	 				 	 	1,476	 	 	 	873	 
	 Inventories
	 	 	5	 	 	 	19,579	 	 	 	21,309	 
		 				 	  
	  
	 
		 				 	 	86,402	 	 	 	82,462	 
		 				 	  
	  
	 
				
	 Non-current assets:
	 				 				 			
	 Property, plant and equipment
	 	 	6	 	 	 	274,505	 	 	 	281,828	 
	 Other assets
	 				 	 	235	 	 	 	234	 
	 Deferred income tax
	 				 	 	648	 	 	 	288	 
		 				 	  
	  
	 
	 Total assets
	 				 	 	361,790	 	 	 	364,812	 
		 				 	  
	  
	 
				
	 LIABILITIES
	 				 				 			
				
	 Current liabilities:
	 				 				 			
	 Accounts payable and accrued liabilities
	 	 	7	 	 	 	33,254	 	 	 	29,828	 
	 Income taxes payable
	 				 	 	4,325	 	 	 	2,357	 
	 Deferred revenue
	 	 	9	 	 	 	1,042	 	 	 	4,904	 
	 Loans payable
	 	 	8	 	 	 	28,226	 	 	 	29,378	 
	 Decommissioning liability
	 				 	 	2,060	 	 	 	1,910	 
	 Other liabilities
	 				 	 	5,053	 	 	 	4,509	 
		 				 	  
	  
	 
		 				 	 	73,960	 	 	 	72,886	 
		 				 	  
	  
	 
				
	 Non-current liabilities:
	 				 				 			
	 Loans payable
	 	 	8	 	 	 	46,814	 	 	 	49,304	 
	 Deferred income tax
	 				 	 	38,578	 	 	 	43,569	 
	 Decommissioning liability
	 				 	 	12,040	 	 	 	11,942	 
	 Other liabilities
	 				 	 	1,307	 	 	 	1,149	 
		 				 	  
	  
	 
	 Total liabilities
	 				 	 	172,699	 	 	 	178,850	 
		 				 	  
	  
	 
				
	 EQUITY
	 				 				 			
	 Share capital
	 	 	10	 	 	 	229,969	 	 	 	228,326	 
	 Accumulated deficit
	 				 	 	(78,218	) 	 	 	(80,775	) 
	 Other reserves
	 				 	 	11,056	 	 	 	12,717	 
		 				 	  
	  
	 
	 Equity attributable to owners of the Company
	 				 	 	162,807	 	 	 	160,268	 
		 				 	  
	  
	 
	 Non-controlling interest
	 	 	11	 	 	 	26,284	 	 	 	25,694	 
		 				 	  
	  
	 
	 Total equity
	 				 	 	189,091	 	 	 	185,962	 
		 				 	  
	  
	 
		 				 				 			
		 				 	  
	  
	 
	 Total liabilities and equity
	 				 	 	361,790	 	 	 	364,812	 
		 				 	  
	  
	 

 Contingencies (note 16) 

Approved on behalf of the Board and authorized for issue on May 11, 2017: 

 

							
	     “Alberto Arias”
	 		  	    “Doug Cater”
	 	
				
	   Alberto Arias
	 		  	   Doug Cater
	 	
	   Chairman of the Board
	 		  	   Chairman Audit Committee
	 	

 The accompanying notes are an integral part of the condensed interim consolidated financial statements. 

  

	
	
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 Sierra Metals Inc. 
 Condensed
Interim Consolidated Statements of Income (Loss) 
 For the three months ended March 31, 2017 and 2016 

(In thousands of United States dollars, except per share amounts, unaudited) 

 
  

													
	 	  	 	 	    	Three Months Ended March 31,	 
	 	  	 	 	    	2017	 	    	2016	 
	 	  	Note	 	    	$	 	    	$	 
		  				    	  
	  
	 
				
	 Revenue
	  				    	 	54,518	 	    	 	23,740	 
				
	 Cost of sales
	  				    				    			
	 Mining costs
	  	 	12	 	    	 	(23,664	) 	    	 	(16,072	) 
	 Depletion, depreciation and amortization
	  	 	12	 	    	 	(16,531	) 	    	 	(9,216	) 
		  				    	  
	  
	 
		  				    	 	(40,195	) 	    	 	(25,288	) 
		  				    	  
	  
	 
		  				    				    			
		  				    	  
	  
	 
	 Gross profit (loss) from mining operations
	  				    	 	14,323	 	    	 	(1,548	) 
		  				    	  
	  
	 
				
	 General and administrative expenses
	  				    	 	(3,622	) 	    	 	(2,981	) 
	 Selling expenses
	  				    	 	(2,004	) 	    	 	(1,470	) 
	 Exploration and evaluation expenditures
	  				    	 	(435	) 	    	 	(284	) 
	 Other operating expenses
	  				    	 	-    	 	    	 	(229	) 
		  				    	  
	  
	 
	 Income (loss) from operations
	  				    	 	8,262	 	    	 	(6,512	) 
		  				    	  
	  
	 
				
	 Other income
	  				    	 	19	 	    	 	216	 
	 Foreign currency exchange gain
	  				    	 	(1,916	) 	    	 	233	 
	 Interest expense and other finance costs
	  				    	 	(1,046	) 	    	 	(1,325	) 
		  				    	  
	  
	 
	 Income (loss) before income taxes
	  				    	 	5,319	 	    	 	(7,388	) 
		  				    	  
	  
	 
				
	 Income tax (expense) recovery:
	  				    				    			
	 Current tax expense
	  				    	 	(6,173	) 	    	 	(190	) 
	 Deferred tax recovery
	  				    	 	4,468	 	    	 	1,618	 
		  				    	  
	  
	 
		  				    	   
	(1,705  
	)   
	    	   
	 1,428 
	   

		  				    	  
	  
	 
	 Net income (loss)
	  				    	 	3,614	 	    	 	(5,960	) 
		  				    	  
	  
	 
				
	 Net income (loss) attributable to:
	  				    				    			
	 Shareholders of the Company
	  				    	 	2,558	 	    	 	(5,116	) 
	 Non-controlling interests
	  				    	 	1,056	 	    	 	(844	) 
		  				    	  
	  
	 
		  				    	 	3,614	 	    	 	(5,960	) 
		  				    	  
	  
	 
				
	 Weighted average shares outstanding (000s)
	  				    				    			
	 Basic
	  				    	 	162,219	 	    	 	161,810	 
	 Diluted
	  				    	 	162,219	 	    	 	161,810	 
				
	 Basic earnings (loss) per share
	  				    	 	0.02	 	    	 	(0.03	) 
	 Diluted earnings (loss) per share
	  				    	 	0.02	 	    	 	(0.03	) 
		  				    	  
	  
	 

 The accompanying notes are an integral part of the condensed interim consolidated financial statements. 

  

	
	 4 | Page

 Sierra Metals Inc. 
 Condensed
Interim Consolidated Statements of Comprehensive Income (Loss) 
 For the three months ended March 31, 2017 and 2016 

(In thousands of United States dollars, unaudited) 

 
  

									
	 	 	Three months ended March 31,	 
	 	 	2017	 	 	2016	 
	 	 	$	 	 	$	 
		 	  
	  
	 
			
	 Net income (loss)
	 	 	3,614	 	 	 	(5,960	) 
			
	 Other comprehensive income (loss)
	 				 			
	 Items that may be subsequently classified to net income (loss):
	 				 			
	 Currency translation adjustments on foreign operations
	 	 	(469	) 	 	 	657	 
		 	  
	  
	 
	 Total comprehensive income (loss)
	 	 	3,145	 	 	 	(5,303	) 
		 	  
	  
	 
			
	 Total comprehensive income (loss) attributable to shareholders
	 	 	2,089	 	 	 	(4,459	) 
	 Non-controlling interests
	 	 	1,056	 	 	 	(844	) 
		 	  
	  
	 
	 Total comprehensive income (loss) attributable to shareholders
	 	 	3,145	 	 	 	(5,303	) 
		 	  
	  
	 

 The accompanying notes are an integral part of the condensed interim consolidated financial statements. 

  

	
	
5 | Page

 Sierra Metals Inc. 
 Condensed
Interim Consolidated Statements of Changes in Equity 
 For the three months ended March 31, 2017 and 2016 

(In thousands of United States dollars, unaudited) 

 
  

																													
	 	 	Common Shares	 	 	 Other

reserves
 $
	 	 	 Retained earnings

(accumulated deficit)
 $
	 	 	 Total attributable

to shareholders
 $
	 	 	 Non-controlling

Interest
 $
	 	 	 Total

shareholders’ equity
 $
	 
	 	 	Shares	 	 	Amounts	 	 	 	 	 	 
	 	 	 	 	 	$	 	 	 	 	 	 
	 Balance at January 1, 2017
	 	 	162,073,293	 	 	 	228,326	 	 	 	12,718	 	 	 	(80,776	) 	 	 	160,268	 	 	 	25,694	 	 	 	185,962	 
								
	 Exercise of RSUs
	 	 	606,138	 	 	 	1,643	 	 	 	(1,643	) 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 
	 Share-based compensation expense
	 	 	-    	 	 	 	-    	 	 	 	450	 	 	 	-    	 	 	 	450	 	 	 	-    	 	 	 	450	 
	 Dividends paid to non-controlling interest
	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	(466	) 	 	 	(466	) 
	 Total comprehensive income
	 	 	-    	 	 	 	-    	 	 	 	(469	) 	 	 	2,558	 	 	 	2,089	 	 	 	1,056	 	 	 	3,145	 
	 Balance at March 31, 2017
	 	 	162,679,431	 	 	 	229,969	 	 	 	11,056	 	 	 	(78,218	) 	 	 	162,807	 	 	 	26,284	 	 	 	189,091	 
							
	 	 	Common Shares	 	 	 Other

reserves
 $
	 	 	 Retained earnings

(accumulated deficit)
 $
	 	 	 Total attributable

to shareholders
 $
	 	 	 Non-controlling

Interest
 $
	 	 	 Total

shareholders’ equity
 $
	 
	 	 	Shares	 	 	Amounts	 	 	 	 	 	 
	 	 	 	 	 	$	 	 	 	 	 	 
	 Balance at January 1, 2016
	 	 	161,746,240	 	 	 	227,969	 	 	 	11,471	 	 	 	(68,511	) 	 	 	170,929	 	 	 	26,645	 	 	 	197,574	 
								
	 Exercise of RSUs
	 	 	193,719	 	 	 	152	 	 	 	(152	) 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 
	 Share-based compensation expense
	 	 	-    	 	 	 	-    	 	 	 	120	 	 	 	-    	 	 	 	120	 	 	 	-    	 	 	 	120	 
	 Dividends paid to non-controlling interest
	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 
	 Total comprehensive loss
	 	 	-    	 	 	 	-    	 	 	 	657	 	 	 	(5,116	) 	 	 	(4,459	) 	 	 	(844	) 	 	 	(5,303	) 
	 Balance at March 31, 2016
	 	 	161,939,959	 	 	 	228,121	 	 	 	12,096	 	 	 	(73,627	) 	 	 	166,590	 	 	 	25,801	 	 	 	192,391	 

 The accompanying notes are an integral part of the condensed interim consolidated financial statements. 

  

	
	
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 Sierra Metals Inc. 
 Condensed
Interim Consolidated Statements of Cash Flows 
 For the three months ended March 31, 2017 and 2016 

(In thousands of United States dollars, unaudited) 

 
  

													
	 	  	 	 	  	Three Months Ended March 31,	 
	 	  	Note	 	  	2017	 	    	2016        	 
	 	  	 	 	  	$	 	    	$        	 
		  				  	  
	  
	 
	 Cash flows from operating activities
	  				  				    			
	 Net income (loss) from operations
	  				  	 	3,614	 	    	 	(5,960)        	 
	 Adjustments for:
	  				  				    			
	 Items not affecting cash:
	  				  				    			
	 Depletion, depreciation and amortization
	  				  	 	16,674	 	    	 	10,557        	 
	 Share-based compensation
	  				  	 	450	 	    	 	120        	 
	 Interest expense and other finance costs
	  				  	 	1,046	 	    	 	1,325        	 
	 Current income tax expense
	  				  	 	6,173	 	    	 	190        	 
	 Deferred income tax recovery
	  				  	 	(4,468	) 	    	 	(1,618)       	 
	 Unrealized foreign currency exchange gain (loss)
	  				  	 	(689	) 	    	 	396        	 
		  				  	  
	  
	 
	 Operating cash flows before movements in working capital
	  				  	 	22,800	 	    	 	5,010        	 
	 Net changes in non-cash working capital items
	  	 	15	 	  	 	(7,654	) 	    	 	(11,423)       	 
	 Decomissioning liabilities settled
	  				  	 	(49	) 	    	 	(45)       	 
	 Income taxes paid
	  				  	 	(4,059	) 	    	 	(1,595)       	 
		  				  	  
	  
	 
	 Cash generated from (used in) operating activities
	  				  	 	11,038	 	    	 	(8,053)       	 
				
	 Cash flows from investing activities
	  				  				    			
	 Capital expenditures
	  				  	 	(9,767	) 	    	 	(3,940)       	 
		  				  	  
	  
	 
	 Cash used in investing activities
	  				  	 	(9,767	) 	    	 	(3,940)       	 
		  				  	  
	  
	 
				
	 Cash flows from (used in) financing activities
	  				  				    			
	 Proceeds from issuance of notes payable
	  	 	8	 	  	 	3,750	 	    	 	3,750        	 
	 Proceeds from issuance of loans and credit facilities
	  	 	8	 	  	 	-    	 	    	 	4,000        	 
	 Repayment of loans and credit facilities
	  	 	8	 	  	 	(7,993	) 	    	 	(1,217)       	 
	 Loans interest paid
	  	 	8	 	  	 	(968	) 	    	 	(757)       	 
	 Dividends paid to non-controlling interest
	  				  	 	(466	) 	    	 	-          	 
		  				  	  
	  
	 
	 Cash from (used in) financing activities
	  				  	 	(5,677	) 	    	 	5,776        	 
		  				  	  
	  
	 
				
	 Effect of foreign exchange rate changes on cash and cash equivalents
	  				  	 	220	 	    	 	262        	 
				
	 Decrease in cash and cash equivalents
	  				  	 	(4,186	) 	    	 	(5,955)       	 
	 Cash and cash equivalents, beginning of period
	  				  	 	42,145	 	    	 	25,102        	 
		  				  	  
	  
	 
	 Cash and cash equivalents, end of period
	  				  	 	37,959	 	    	 	19,147        	 
		  				  	  
	  
	 
				
	 Supplemental cash flow information
	  	 	15	 	  				    			

 The accompanying notes are an integral part of these condensed interim consolidated financial statements. 

  

	
	
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 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated, unaudited) 

 
  

	1	 Description of business and nature of operations 

Sierra Metals Inc. (“Sierra Metals” or the “Company”) was incorporated under the Canada Business Corporations Act on
April 11, 1996, and is a Canadian and Peruvian listed mining company focused on the production, exploration and development of precious and base metals in Peru and Mexico. The Company’s key priorities are to generate strong cash flows and
to maximize shareholder value. 
 The Company’s shares are listed on the TSX and the Bolsa de Valores de Lima (“BVL”)
and its registered office is 79 Wellington St W, Suite 2100, Toronto, Ontario, M5K 1H1, Canada. 
 The Company owns an 81.84% interest
in the polymetallic Yauricocha Mine in Peru and a 100% interest in the Bolivar and Cusi Mines in Mexico. In addition to its producing mines, the Company also owns various exploration projects in Mexico and Peru. 

 

	2	 Significant accounting policies 

The significant accounting policies used in the preparation of these condensed interim consolidated financial statements are as follows:

  

	 	(a)	 Basis of preparation 

These condensed interim consolidated financial statements have been prepared in accordance with International Financial Reporting
Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”) applicable to the preparation of interim financial statements, including IAS 34, Interim Financial Reporting. These unaudited condensed interim
consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2016. The Company’s significant accounting policies were presented in note 2
to the consolidated financial statements for the year ended December 31, 2016, and have been consistently applied in the preparation of these condensed interim consolidated financial statements. These condensed interim consolidated financial
statements were authorized for issuance by the Board of Directors on May 11, 2017. 
  

	 	(b)	 Basis of consolidation 

These condensed interim consolidated financial statements include the accounts of the Company and its subsidiaries, which are entities
controlled by the Company. Control exists when the Company is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. Subsidiaries are
consolidated from the date that control commences until the date that control ceases. 
 Non-controlling interests represent equity
interests in subsidiaries owned by outside parties. Changes in the parent company’s ownership interest in subsidiaries that do not result in a loss of control are accounted for as equity transactions. 

  

	
	
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 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	2	Significant accounting policies (continued) 

 The principal subsidiaries of the Company and their
geographical locations as at March 31, 2017 are as follows: 
  

					
	Name of the subsidiary	  	Ownership interest	 	Location
			
	 Dia Bras EXMIN Resources Inc.
	  	100%	 	Canada
	 Plexmar Resources Inc.
	  	100%	 	Canada
	 Sociedad Minera Corona, S. A. (“Corona”)
1
	  	81.84%	 	Perú
	 Dia Bras Peru, S. A. C. (“Dia Bras Peru”)
1
	  	100%	 	Perú
	 Sociedad Minera San Miguelito, S. A. C.
	  	100%	 	Perú
	 Dia Bras Mexicana, S. A. de C. V. (“Dia Bras Mexicana”)
	  	100%	 	México
	 Servicios de Minería de la Sierra, S. A. de C. V.
	  	100%	 	México
	 Bolívar Administradores, S. A. de C. V.
	  	100%	 	México
	 Exploraciones Mineras Dia Bras, S. A. de C. V.
	  	100%	 	México
	 EXMIN, S. A. de C. V.
	  	100%	 	México

 1The Company, through its wholly owned subsidiary Dia Bras
Peru, holds an 81.84% interest in Corona, which represents 92.33% of the voting shares. The Company consolidates Corona’s financial results and records a non-controlling interest for the 18.16% that it does not own. 

 

	3	Adoption of new accounting standards and future accounting changes 

 Future accounting changes

 The following standards and amendments to existing standards have been published and are mandatory for annual periods beginning January 1,
2018, or later periods: 
 IFRS 9, Financial Instruments: Recognition and measurement (“IFRS 9”) 

The IASB issued its completed version of IFRS 9, Financial Instruments (“IFRS 9”) in July 2014. The completed standard provides revised
guidance on the recognition and measurement of financial assets and liabilities. It also introduces a new expected credit loss model for calculating impairment for financial assets and liabilities. The new hedging guidance that was issued in
November 2013 is incorporated into this new final standard. 
 This final version of IFRS 9 will be effective for annual periods beginning on or after
January 1, 2018, with early adoption permitted. The Company is currently evaluating the extent of the impact of the adoption of this standard. 

IFRS 15, Revenue from Contracts with Customers (“IFRS 15”) 

IFRS 15, was issued in May 2014, which covers principles for reporting the nature, amount, timing and uncertainty of revenue and cash flows arising from
contracts with customers. IFRS 15 is effective for annual periods beginning on or after January 1, 2018. The Company has not yet determined the potential impact of adopting this standard on its consolidated financial statements. 

  

	
	
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 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	3	 Adoption of new accounting standards and future accounting changes (continued) 

IFRS 16, Leases (“IFRS 16”) 

In January 2016, the IASB issued this standard which is effective for periods beginning on or after January 1, 2019, which replaces
the current guidance in IAS 17, Leases, and is to be applied either retrospectively or a modified retrospective approach. Early adoption is permitted, but only in conjunction with IFRS 15, Revenue from Contracts with Customers. Under
IAS 17, lessees were required to make a distinction between a finance lease (on balance sheet) and an operating lease (off balance sheet). IFRS 16 now requires lessees to recognize a lease liability reflective of future lease payments and a
“right-of-use asset” for virtually all lease contracts. The Company has not yet determined the effect of adoption of IFRS 16 on its consolidated financial statements. 

Adoption of new accounting standards 

Amendments to IAS 7, Statements of Cash Flows (“IAS 7”) 

The amendments require disclosures that enable users of financial statements to evaluate changes in liabilities arising from financing
activities, including both changes arising from cash flow and non-cash changes. The amendments apply prospectively for annual periods beginning on or after January 1, 2017, with earlier application permitted. The Company intends to adopt the
amendments to IAS 7 in its financial statements for the annual period beginning on January 1, 2017. The Company has determined that there is no impact from adopting the amendments to IAS 7 on its consolidated financial statements. 

  

	
	
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 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	4	 Trade and other receivables 

 

									
	 	  	March 31,	 	  	December 31,	 
	 	  	2017	 	  	2016	 
	  	  	$	 	  	$	 
	 Trade receivables
	  	 	20,861	 	  	 	12,840	 
	 Sales tax receivables
	  	 	5,648	 	  	 	4,617	 
	 Other receivables
	  	 	574	 	  	 	397	 
	 	  	 	27,083	 	  	 	17,854	 

 The Company did not hold any collateral for any receivable amounts outstanding at March 31,
2017 or December 31, 2016. 
  

	5	 Inventories 

 

									
	 	  	March 31,	 	  	December 31,	 
	 	  	2017	 	  	2016	 
	  	  	$	 	  	$	 
	 Stockpiles
	  	 	1,030	 	  	 	1,585	 
	 Concentrates
	  	 	6,220	 	  	 	6,647	 
	 Supplies and spare parts
	  	 	12,329	 	  	 	13,077	 
	 	  	 	19,579	 	  	 	21,309	 

 Cost of sales are comprised of production costs of sales and depletion, depreciation and
amortization, and represent the cost of inventories recognized as an expense for the periods ended March 31, 2017 and 2016, respectively. During the three months ended March 31, 2017, the Company wrote down stockpile and concentrate
inventory to its NRV, recording a charge of $907 (2016- $299). 

  

	
	
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 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	6	 Property, plant and equipment 

 

																					
	 	 	 	 	 	 	 	 	 	 	 	Exploration and	 	 	 	 
	 	 	Plant and	 	 	Mining	 	 	Assets under	 	 	evaluation	 	 	 	 
	Cost	 	equipment	 	 	properties	 	 	construction	 	 	expenditure	 	 	Total $	 
	     
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 Balance as of January 1, 2016
	 	 	192,566	 	 	 	418,334	 	 	 	23,873	 	 	 	38,911	 	 	 	673,684	 
						
	 Additions
	 	 	4,130	 	 	 	6,490	 	 	 	8,649	 	 	 	6,600	 	 	 	25,869	 
	 Disposals
	 	 	(325	) 	 	 	-	 	 	 	-	 	 	 	-	 	 	 	(325	) 
	 Foreign exchange revaluation
	 	 	-	 	 	 	-	 	 	 	-	 	 	 	(158	) 	 	 	(158	) 
	 Transfers
	 	 	6,316	 	 	 	379	 	 	 	(6,316	) 	 	 	(379	) 	 	 	-	 
	 Balance as of December 31,
2016
	 	 	202,687	 	 	 	425,203	 	 	 	26,206	 	 	 	44,974	 	 	 	699,070	 
						
	 Additions
	 	 	2,079	 	 	 	3,229	 	 	 	2,815	 	 	 	1,408	 	 	 	9,531	 
	 Transfers
	 	 	131	 	 	 	-	 	 	 	(131	) 	 	 	-	 	 	 	-	 
	 Balance as of March 31,
2017
	 	 	204,897	 	 	 	428,432	 	 	 	28,890	 	 	 	46,382	 	 	 	708,601	 
	     
	 				 				 				 				 			
	 Balance as of January 1,
2016
	 	 	106,436	 	 	 	252,381	 	 	 	-	 	 	 	13,041	 	 	 	371,858	 
						
	 Depletion, depreciation and amortization
	 	 	15,818	 	 	 	29,616	 	 	 	-	 	 	 	-	 	 	 	45,434	 
	 Disposals
	 	 	(50	) 	 	 	-	 	 	 	-	 	 	 	-	 	 	 	(50	) 
	 Balance as of December 31,
2016
	 	 	122,204	 	 	 	281,997	 	 	 	-	 	 	 	13,041	 	 	 	417,242	 
						
	 Depletion, depreciation and amortization
	 	 	5,658	 	 	 	11,196	 	 	 	-	 	 	 	-	 	 	 	16,854	 
	 Balance as of March 31,
2017
	 	 	127,862	 	 	 	293,193	 	 	 	-	 	 	 	13,041	 	 	 	434,096	 
						
	     
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 Net Book Value - March 31, 2017
	 	 	77,035	 	 	 	135,239	 	 	 	28,890	 	 	 	33,341	 	 	 	274,505	 
	 Net Book Value - December 31, 2016
	 	 	80,483	 	 	 	143,206	 	 	 	26,206	 	 	 	31,933	 	 	 	281,828	 
	 Net Book Value -
December 31, 2015
	 	 	86,130	 	 	 	165,953	 	 	 	23,873	 	 	 	25,870	 	 	 	301,826	 

  

	7	 Accounts payable and accrued liabilities 

 

									
	 	  	March 31,	 	  	December 31,	 
	 	  	2017	 	  	2016	 
	  	  	$	 	  	$	 
			
	 Trade payables
	  	 	20,822	 	  	 	18,428	 
	 Other payables and accrued liabilities
	  	 	12,432	 	  	 	11,400	 
	 	  	 	33,254	 	  	 	29,828	 

 All accounts payable and accrued liabilities are expected to be settled within 12 months. 

  

	
	
12 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	8	 Loans payable 

 

									
	 	  	March 31,	 	  	December 31,	 
	 	  	2017	 	  	2016	 
	  	  	$	 	  	$	 
			
	 Current
	  				  			
			
	 Acquisition loan with Banco de Credito del Peru (a)
	  	 	5,794	 	  	 	5,784	 
	 Operating loan with Banco de Credito del Peru (b)
	  	 	5,723	 	  	 	6,211	 
	 Note payable to Scotiabank in Peru (c)
	  	 	14,750	 	  	 	14,750	 
	 Other credit facilities (d)
	  	 	366	 	  	 	1,179	 
	 Loan with FIFOMI (e)
	  	 	1,593	 	  	 	1,454	 
	 	  	 	28,226	 	  	 	29,378	 
			
	 Non-current
	  				  			
			
	 Acquisition loan with Banco de Credito del Peru (a)
	  	 	38,587	 	  	 	40,036	 
	 Operating loan with Banco de Credito del Peru (b)
	  	 	5,306	 	  	 	6,238	 
	 Loan with FIFOMI (e)
	  	 	2,921	 	  	 	3,030	 
	 	  	 	46,814	 	  	 	49,304	 
	     
	  	 	 	 	  	 	 	 
	 Total loans payable
	  	 	75,040	 	  	 	78,682	 

  

	 	(a)	  Corona Acquisition Loan with Banco de Credito del Peru S.A. (“BCP”) 

On May 24, 2011, the Company’s wholly owned subsidiary Dia Bras Peru entered into a loan agreement with BCP amounting to
$150,000. After deducting financing costs of $3,750, the net proceeds were $146,250. The proceeds from this loan were used to fund a portion of the purchase consideration for the acquisition of the Company’s 81.84% interest in Corona in Peru.
The loan was repayable over 5 years ending on May 24, 2016 and carried interest at a rate of LIBOR plus 4.5% per annum, payable quarterly in arrears. 

On August 7, 2015, Dia Bras Peru signed an amended agreement with BCP for the then outstanding debt balance of $48,000. The most
significant amendments to the agreement were: 
  

	 	•	 	 The remaining $48,000 due on the facility was split into 2 tranches 

 

	 	•	 	 Tranche 1, in the amount of $24,000 has quarterly principal repayments of $1,500 beginning in November 2016 and ending
in August 2020 

  

	 	•	 	 Tranche 2, in the amount of $24,000 has no quarterly principal repayments and to be repaid in full in August 2020

  

	 	•	 	 One year principal repayment grace period 

 

	 	•	 	 Reduced Interest rate equal to 3.65% plus 3M LIBOR vs previous rate of 4.15% plus 3M LIBOR 

 

	 	•	 	 Term of the Facility extended for 5 Years 

These amendments did not trigger the de-recognition rules under IAS 39 - Financial Instruments. 

Principal repayments totalling $1,500 have been made for the three months ended March 31, 2017 (2016 - $Nil). 

  

	
	
13 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	8	 Loans payable (continued) 

 

 The loan is recorded at amortized cost and is being accreted to face value over 5 years
using an effective interest rate of 4.71%. An amortization expense related to the transaction costs for $61 has been recorded for the three months ended March 31, 2017 (2016 - $124). Interest payments totalling $551 have been made for the three
months ended March 31, 2017 (2016 - $486). 
 The loan with BCP is secured by a pledge over Dia Bras Peru’s interest in
Corona voting shares and is guaranteed by the Company. The Company is in compliance with all financial covenants as at March 31, 2017. 
  

	 	(b)	  Corona Operating Loan with BCP 

On October 17, 2013, the Company’s subsidiary Corona, in which the Company has an interest of 81.84%, entered into a credit
facility with the BCP for up to $60,000. The credit facility is for a 5 year term and the funds can be drawn within the first 3 years in tranches of up to $40,000 during the first year, up to $30,000 during the second year and up to $20,000 during
the third year. The loan bears interest of LIBOR plus 4.5% and the loan principal and interest are payable in quarterly installments over the term of the loan with the first payment due 15 months after the closing of the credit facility. The loan is
guaranteed by the collection rights and future cash flows generated from the sale of ore concentrates and other products. The loan contains certain financial covenants, events of default and other provisions which are customary for a transaction of
this nature. These covenants include maintaining an equity balance at the Corona level higher than $30 million, maintaining a Debt Service Coverage ratio higher than 1.1x, and maintaining a Net Financial Debt/EBITDA ratio lower than 2.0x. 

The Company is in compliance with all financial covenants as at March 31, 2017. 

On June 29, 2016, $5,000 was drawn from this facility bearing an interest rate of three months LIBOR plus 4.5%. 

Principal repayments totalling $1,563 have been made for the three months ended March 31, 2017 (2016 – $938). Interest payments
totalling $134 have been made for the three months ended March 31, 2017 (2016 – $184). 
  

	 	(c)	  Corona Notes payable with Scotiabank Peru 

In order to fund its short term working capital needs, Corona repaid and drew down the following notes payable: 

 

	 	•	 	 A revolving credit facility from Scotiabank Peru for $11,000 bearing an annual interest rate of 1.99% matured and was
repaid in full on May 6, 2016. 

  

	 	•	 	 On May 6, 2016 a new $15,000 revolving credit facility with Scotiabank was obtained. $11,000 was drawn to repay the
$11,000 that was outstanding on the previous facility. The new credit facility bears an interest rate of three month LIBOR plus 2.00%. 

  

	 	•	 	 On February 8, 2016, $3,750 was drawn from this facility which bears an interest rate of LIBOR plus 1.9%.

  

	
	
14 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	8	 Loans payable (continued) 

 

	 	(d)	  Other credit facilities 

 

	 	•	 	 Pre-Export Finance Facility (“the Pre-Export Finance Facility”): On March 2, 2016, Dia Bras
Mexicana (“DBM”) entered into a $4,000 Pre-Export Finance Facility with METAGRI S.A de C.V (“METAGRI”), to whom DBM sells all of its lead concentrate. The $4,000 facility was drawn down on March 2, 2016 and bears interest of
5.0% plus 1 year LIBOR. 

 Repayment will take place against deliveries of lead concentrate for the period of April
2016 up to and including June 2017. METAGRI will deduct seven hundred dollars per dry metric ton of material from the purchase price payable to DBM in the provisional payment for each dry metric ton of the material delivered to METAGRI under the
sales contract, subject to a minimum monthly deduction of two hundred and seventy thousand dollars (“the minimum monthly deduction”) plus the accrued interest. If DBM fails to deliver the material during any month from April 2016 until and
including June 2017, and/or the value of the material during any month is lower than the minimum monthly deduction plus the accrued interest, DBM will repay METAGRI the short-fall within two business days after METAGRI’s written notice. 

The deductions will be made until such time as the Pre-Export Finance Facility has been fully amortized and the interest had been fully
serviced. DBM has agreed that METAGRI can set-off any final payment deferred under the sales contract against any outstanding Pre-Export Finance Facility or interest to ensure full amortization of the principal and service the interest. 

During the three month period ended March 31, 2017, DBM has made repayments totaling $810 (2016 - $Nil). 

 

	 	(e)	  FIFOMI loan 

  

	 	•	 	 During January 2015, the Company’s Mexican Subsidiary, Dia Bras Mexicana S.A. de C.V, received a loan of MXP$120
million from Nacional Financiera, Sociedad Fiduciaria del Fideicomiso de Fomento Minero (“FIFOMI”) to be used for working capital purposes and capital expenditures, specifically the expansion of the Piedras Verdes Plant.

 On February 2, 2015, DBM drew MXP$120 million (US$7,995). After deducting transaction costs of US$124, net
proceeds were US$7,871. 
 Monthly principal repayments have taken place over four years beginning in January 2016 at an interest rate
of TIIE + 3%. Interest payments began in February 2015 and during the three months ended March 31, 2017, DBM has made interest payments of $89 (MXP$1,804) (2016 – $92). Principal payments of $369 (MXP$7,500) (2016 - $279) have been made
during the three months ended March 31, 2017. 

  

	
	
15 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	9	 Deferred revenue 

During December 2016 the Company received a payment of $4,904 for copper concentrate stockpiled at the Piedras Verdes Plant which was
awaiting a new filter in order to further process and dry the concentrate. The Company entered into an agreement with their customer, Trafigura Mexico S.A. de C.V. (“Trafigura”) who agreed to pay for the concentrate in advance with certain
stipulations. The Company must pay interest to Trafigura on the advance payment at the LIBOR 3-month rate plus 3% from the date the advance payment was made to the date when the first provisional payment for the product is otherwise due. The 4,100
DMT of copper concentrate stockpiled must be delivered according to the following schedule: 705 DMT during January 2017, 1,200 DMT during February 2017, 1,200 DMT during March 2017 and 950 DMT during April 2017. Since the copper concentrate
inventory was not shipped to Trafigura during 2016, and the advance payment was received during 2016, as per the terms of the agreement and holding certificate granted, the payment was recorded as deferred revenue. The amount is being subsequently
drawn down as the concentrate is shipped to Trafigura, which resulted in revenues being recognized in the first quarter of 2017. Interest has been accrued according with the terms of the agreement and has been recorded in accrued liabilities. 

 

	10	 Share capital and share-based payments 

 

	 	(a)	 Authorized capital 

The Company has an unlimited amount of authorized common shares with no par value. 

 

	 	(b)	 Stock options 

The changes in stock options outstanding during the three months ended March 31, 2017 and the year ended December 31, 2016 was
as follows: 
  

																	
	 	  	 	 	  	March 31,	 	  	 	 	 	December 31,	 
	 	  	  	 	  	2017	 	  	  	 	 	2016	 
					
	 	  	Number	 	  	Weighted	 	  	Number	 	 	Weighted	 
	 	  	of options	 	  	average	 	  	of options	 	 	average	 
	 	  	 	 	  	exercise	 	  	 	 	 	exercise	 
	 	  	  	 	  	price C$	 	  	  	 	 	price C$	 
	 Outstanding, beginning of period
	  	 	-      	 	  	 	-      	 	  	 	7,116	 	 	 	3.40  	 
	 Granted
	  	 	-      	 	  	 	-      	 	  	 	-      	 	 	 	-      	 
	 Exercised
	  	 	-      	 	  	 	-      	 	  	 	-      	 	 	 	-      	 
	 Forfeited
	  	 	-      	 	  	 	-      	 	  	 	-      	 	 	 	-      	 
	 Expired
	  	 	-      	 	  	 	-      	 	  	 	(7,116	) 	 	 	3.40  	 
	 Outstanding, end of period
	  	 	-      	 	  	 	-      	 	  	 	-      	 	 	 	-      	 
					
	 Exercisable, end of period
	  	 	-      	 	  	 	-      	 	  	 	-      	 	 	 	-      	 

  

	
	
16 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	10	 Share capital and share-based payments (continued) 

 

	 	(c)	  Restricted share units (“RSUs”) 

The changes in RSU’s issued during the three months ended March 31, 2017 and the year ended December 31, 2016 was as
follows: 
  

									
	  	  	March 31,	 	 	December 31,	 
	  	  	2017	 	 	2016	 
	 Outstanding, beginning of period
	  	 	1,771,877	 	 	 	874,788	 
	 Granted
	  	 	1,126,254	 	 	 	1,278,753	 
	 Exercised
	  	 	(606,138	) 	 	 	(327,053	) 
	 Forfeited
	  	 	-      	 	 	 	(54,611	) 
	 Outstanding, end of period
	  	 	2,291,993	 	 	 	1,771,877	 

 On June 29, 2012, the Company’s shareholders approved the RSU plan, whereby RSUs may be
granted to directors, officers, consultants or employees at the discretion of the Board of Directors. The RSU plan provides for the issuance of common shares from treasury upon the exercise of vested RSUs at no additional consideration. The current
maximum number of common shares authorized for issue under the RSU plan is 8,000,000. The RSUs have vesting conditions determined by the Board of Directors. 

During the three months ended March 31, 2017, the Company granted one tranche of RSU’s totalling 1,126,254 which had a fair
value of C$3.67 based on the closing share price at grant date. RSUs exercised during the three months ended March 31, 2017 had a weighted average fair value of C$3.61 (2016 – C$1.52). As at March 31, 2017, the weighted average fair
value of the RSUs outstanding is C$2.39 (2016 – C$1.51). 

  

	
	
17 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	11	 Non-controlling interest 

Set out below is the summarized financial information of our subsidiary Corona which has a material non-controlling interest (note
2(b)). The information below is before intercompany eliminations and after fair value adjustments on acquisition of the entity. 

Summarized balance sheet 
  

									
	  	    	 March 31,

2017
 $
	 	 	 December 31,

2016
 $
	 
	 Current
	    				 			
	 Assets
	    	 	72,884	 	 	 	62,731	 
	 Liabilities
	    	 	(45,900	) 	 	 	(42,147	) 
	 Total current net assets
	    	 	26,984	 	 	 	20,584	 
			
	 Non-current
	    				 			
	 Assets
	    	 	171,497	 	 	 	180,196	 
	 Liabilities
	    	 	(53,251	) 	 	 	(58,801	) 
	 Total non-current net assets
	    	 	118,246	 	 	 	121,395	 
	 Net assets
	    	 	145,230	 	 	 	141,979	 
		
	 Summarized income statement
  
	    	 	 
	 	    	For the three months ended March 31,    	 
	  	    	 2017

$
	 	 	 2016

$
	 
			
	 Revenue
	    	 	38,501	 	 	 	12,500	 
	 Income (loss) before income tax
	    	 	7,273	 	 	 	(6,139	) 
	 Income tax recovery (expense)
	    	 	(1,457	) 	 	 	1,491	 
	 Total income (loss)
	    	 	5,816	 	 	 	(4,648	) 
	 Total income (loss) attributable to non-controlling
interests
	    	 	1,056	 	 	 	(844	) 
	 Dividends paid to non-controlling interests
	    	 	(466	) 	 	 	-    	 

 Summarized cash flows 

 

									
	 	    	For the three months ended March 31,    	 
	  	    	 2017

$
	 	 	 2016

$
	 
			
	 Cash flows from operating activities
	    				 			
	 Cash generated from operating activities
	    	 	20,417	 	 	 	1,077	 
	 Net changes in non cash working capital items
	    	 	(4,993	) 	 	 	(5,014	) 
	 Decomissioning liabilities settled
	    	 	(49	) 	 	 	(45	) 
	 Income taxes paid
	    	 	(4,059	) 	 	 	(1,595	) 
	 Net cash generated from operating activities
	    	 	11,316	 	 	 	(5,577	) 
	 Net cash used in investing activities
	    	 	(4,164	) 	 	 	(1,570	) 
	 Net cash from (used in) financing activities
	    	 	(8,675	) 	 	 	2,628	 
	 Effect of foreign exchange rate changes on cash and cash
equivalents
	    	 	16	 	 	 	(5	) 
	 Decrease in cash and cash equivalents
	    	 	(1,507	) 	 	 	(4,524	) 
	 Cash and cash equivalents, beginning of year
	    	 	36,877	 	 	 	21,818	 
	 Cash and cash equivalents, end of period
	    	 	35,370	 	 	 	17,294	 

  

	
	
18 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	12	 Expenses by nature 

Mining costs include mine production costs, milling and transport costs, royalty expenses, site administration costs but not the primary
mine development costs which are capitalized and depreciated over the specific useful life or reserves related to that development and ore included in depreciation and amortization. The mining costs for the three months ended March 31, 2017 and
2016 relate to the Yauricocha, Bolivar and Cusi Mines. 
  

	 	(a)	 Mining costs 

  

											
	 	 	 Three months ended March 31,    
	 
	 	 	 	  	2017	 	  	2016	 
	  	 	  	  	$	 	  	$	 
	 Employee compensation and benefits
	 		  	 	5,485	 	  	 	3,056 	 
	 Third party and contractors costs
	 		  	 	9,588	 	  	 	6,728 	 
	 Depreciation
	 		  	 	16,531	 	  	 	9,216 	 
	 Consumables
	 		  	 	6,531	 	  	 	7,064 	 
	 Other
	 	 	  	 	2,060	 	  	 	(776)	 
	 	 	 	  	 	40,195	 	  	 	25,288 	 

  

	13	 Segment reporting 

The Company primarily manages its business on the basis of the geographical location of its operating mines. The Company’s
operating segments are based on the reports reviewed by the senior management group that are used to make strategic decisions. The Chief Executive Officer considers the business from a geographic perspective considering the performance of the
Company’s business units. The corporate division only earns income that is considered to be incidental to the activities of the Company and thus it does not meet the definition of an operating segment; as such it has been included within
“other reconciling items.” 
 The reporting segments identified are the following: 

 

	 	•	 	 Peru – Yauricocha Mine 

  

	 	•	 	 Mexico – Bolivar and Cusi Mines 

The following is a summary of the reported amounts of net income (loss) and the carrying amounts of assets and liabilities by operating
segment: 

  

	
	
19 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	13	 Segment reporting (continued) 

 

																					
	 	  	Peru	 	  	Mexico	 	  	Mexico	 	  	Canada	 	  	 	 
	 	  	Yauricocha Mine	 	  	Bolivar Mine	 	  	Cusi Mine	 	  	Corporate	 	  	Total	 
	Three months ended March 31, 2017	  	$	 	  	$	 	  	  	 	  	$	 	  	$	 
						
	 Revenue
	  	 	38,501 	 	  	 	13,811 	 	  	 	2,206 	 	  	 	-  	 	  	 	54,518 	 
						
	 Production cost of sales
	  	 	(15,128)	 	  	 	(7,000)	 	  	 	(1,536)	 	  	 	-  	 	  	 	(23,664)	 
	 Depletion of mineral property
	  	 	(9,631)	 	  	 	(1,002)	 	  	 	(220)	 	  	 	-  	 	  	 	(10,853)	 
	 Depreciation and amortization of property, plant and
equipment
	  	 	(2,993)	 	  	 	(2,202)	 	  	 	(483)	 	  	 	-  	 	  	 	(5,678)	 
	 Cost of sales

 
	  	   
	 (27,752) 
	   
	  	   
	 (10,204) 
	   
	  	   
	 (2,239) 
	   
	  	   
	 -   
	   
	  	   
	(40,195)  
	   

	 Gross profit (loss) from mining operations
	  	 	10,749 	 	  	 	3,607 	 	  	 	(33)	 	  	 	-  	 	  	 	14,323 	 
						
	 Income (loss) from operations
	  	 	7,657 	 	  	 	1,573 	 	  	 	(422)	 	  	 	(546)	 	  	 	8,262 	 
	 Interest expense and other finance costs
	  	 	(900)	 	  	 	-  	 	  	 	(146)	 	  	 	-  	 	  	 	(1,046)	 
	 Other income (expense)
	  	 	119 	 	  	 	(81)	 	  	 	(18)	 	  	 	(1)	 	  	 	19 	 
	 Foreign currency exchange gain (loss)
	  	 	(217)	 	  	 	(1,340)	 	  	 	(346)	 	  	 	(13)	 	  	 	(1,916)	 
	 Income (loss) before income tax
	  	 	6,659 	 	  	 	152 	 	  	 	(932)	 	  	 	(560)	 	  	 	5,319 	 
						
	 Income tax expense

 
	  	   
	 (1,457) 
	   
	  	   
	 (204) 
	   
	  	   
	 (44) 
	   
	  	   
	 -   
	   
	  	   
	(1,705)  
	   

	 Net income (loss) from operations
	  	 	5,202 	 	  	 	(52)	 	  	 	(976)	 	  	 	(560)	 	  	 	3,614 	 
	 	  	 	 	 	  	 	 	 	  	 	 	 	  	 	 	 	  	 	 	 
	 March 31, 2017
	  	 	Peru	 	  	 	      Mexico	 	  	 	Canada	 	  			
						
	 Total assets
	  	 	235,096 	 	  				  	 	116,275 	 	  	 	10,419 	 	  	 	361,790 	 
	 Non-current assets
	  	 	171,559 	 	  				  	 	94,772 	 	  	 	8,409 	 	  	 	274,740 	 
	 Total liabilities
	  	 	143,343 	 	  	 	 	 	  	 	26,811 	 	  	 	2,545 	 	  	 	172,699 	 

  

	
	
20 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	13	 Segment reporting (continued) 

 

																					
	 	  	Peru	 	 	Mexico	 	 	Mexico	 	 	Canada	 	 	 	 
	 	  	Yauricocha Mine	 	 	Bolivar Mine	 	 	Cusi Mine	 	 	Corporate	 	 	Total	 
	Three months ended March 31, 2016	  	$	 	 	$	 	 	  	 	 	$	 	 	$	 
						
	 Revenue
	  	 	12,500	 	 	 	8,300	 	 	 	2,940	 	 	 	-    	 	 	 	23,740	 
						
	 Production cost of sales
	  	 	(9,276	) 	 	 	(5,573	) 	 	 	(1,223	) 	 	 	-    	 	 	 	(16,072	) 
	 Depletion of mineral property
	  	 	(5,285	) 	 	 	(933	) 	 	 	(205	) 	 	 	-    	 	 	 	(6,423	) 
	 Depreciation and amortization of property, plant and
equipment
	  	 	(1,066	) 	 	 	(1,416	) 	 	 	(311	) 	 	 	-    	 	 	 	(2,793	) 
	 Cost of sales
  
	  	   
	 (15,627 
	 )  
	 	   
	 (7,922 
	 )  
	 	   
	 (1,739 
	 )  
	 	   
	 -     
	   
	 	   
	(25,288  
	)   

	 Gross profit (loss) from mining
operations
	  	 	(3,127	) 	 	 	378	 	 	 	1,201	 	 	 	-    	 	 	 	(1,548	) 
						
	 Income (loss) from operations
	  	 	(5,614	) 	 	 	(219	) 	 	 	(68	) 	 	 	(611	) 	 	 	(6,512	) 
	 Interest expense and other finance costs
	  	 	(1,171	) 	 	 	-    	 	 	 	(154	) 	 	 	-    	 	 	 	(1,325	) 
	 Other income
	  	 	43	 	 	 	136	 	 	 	30	 	 	 	7	 	 	 	216	 
	 Foreign currency exchange gain (loss)
	  	 	24	 	 	 	820	 	 	 	156	 	 	 	(767	) 	 	 	233	 
	 Income (loss) before income
tax
	  	 	(6,718	) 	 	 	737	 	 	 	(36	) 	 	 	(1,371	) 	 	 	(7,388	) 
						
	 Income tax (expense) recovery
  
	  	   
	 1,490 
	   
	 	   
	 (51 
	 )  
	 	   
	 (11 
	 )  
	 	   
	 -     
	   
	 	   
	1,428  
	   

	 Net income (loss) from
operations
	  	 	(5,228	) 	 	 	686	 	 	 	(47	) 	 	 	(1,371	) 	 	 	(5,960	) 
					
	March 31, 2016	  	        Peru	 	 	Mexico	 	 	Canada	 	 	Total	 
						
	 Total assets
	  	 	239,491	 	 				 	 	117,792	 	 	 	8,243	 	 	 	365,526	 
	 Non-current assets
	  	 	192,063	 	 				 	 	100,483	 	 	 	6,839	 	 	 	299,385	 
	 Total liabilities
	  	 	145,007	 	 	 	 	 	 	 	27,198	 	 	 	929	 	 	 	173,134	 

 For the three months ended March 31, 2017, 70% of the revenues ($38,501) were from two
customers based in Peru and the remaining 30% of the revenues ($16,017) were from two customers based in Mexico. In Peru, the two customers accounted for 68% and 32% of the revenues. In Mexico, the two customers accounted for 85% and 15% of the
revenues. 
 For the three months ended March 31, 2016, 53% of the revenues ($12,500) were from two customers based in Peru and
the remaining 47% of the revenues ($11,240) were from two customers based in Mexico. In Peru, the two customers accounted for 55% and 45% of the revenues. In Mexico, the two customers accounted for 77% and 23% of the revenues. 

As at March 31, 2017, the trade receivable balance of $20,861 includes amounts outstanding of $3,653 and $17,168 from two customers
in Mexico and two customers in Peru, respectively. 

  

	
	
21 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	14	 Financial instruments and financial risk management 

The Company’s financial instruments include cash and cash equivalents, trade receivables, financial assets, accounts payable and
loans payable. 
  

	 	(a)	 Fair value of financial instruments 

As at March 31, 2017 and December 31, 2016, the fair value of the financial instruments approximates their carrying value. 

 

	 	(b)	 Fair value hierarchy 

Financial instruments carried at fair value are categorized based on a three level valuation hierarchy that reflects the significance of
inputs used in making the fair value measurements as follows: 
 Level 1 – quoted prices (unadjusted) in active markets for
identical assets and liabilities 
 Level 2 – inputs other than quoted prices included in Level 1 that are observable for the
asset or liability, either directly (i.e., as prices) or indirectly (i.e., derived from prices) 
 The Company’s metal concentrate
sales are subject to provisional pricing with the selling prices adjusted at the end of the quotational period. The Company’s trade receivables are marked-to-market at each reporting period based on quoted forward prices for which there exists
an active commodity market. 
 Level 3 – inputs for the asset or liability that are not based on observable market data. 

At March 31, 2017 and December 31, 2016, the levels in the fair value hierarchy into which the Company’s financial assets
and liabilities are measured and recognized on the Consolidated Statement of Financial Position are categorized as follows: 
  

																																	
	  	  	March 31, 2017	 	  	  	 	  	  	 	  	December 31, 2016	 
	Recurring measurements	  	Level 1	 	  	Level 2	 	  	Level 3	 	  	Total	 	  	Level 1	 	  	Level 2	 	  	Level 3	 	  	Total	 
	  	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 	  	$	 
	 Trade receivables
(1)
	  	 	-    	 	  	 	20,861	 	  	 	-    	 	  	 	20,861	 	  	 	-    	 	  	 	12,840	 	  	 	-    	 	  	 	12,840	 
	 	  	 	-    	 	  	 	20,861	 	  	 	-    	 	  	 	20,861	 	  	 	-    	 	  	 	12,840	 	  	 	-    	 	  	 	12,840	 

 (1)Trade receivables exclude sales and income
tax receivables. 
 There were no transfers between level 1 and level 2 during the three months ended March 31, 2017 and 2016.

  

	
	
22 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	15	 Supplemental cash flow information 

Changes in working capital 
  

									
	 	  	Three months ended March 31,    	 
	 	  	2017	 	 	2016	 
	  	  	$	 	 	$	 
	 Trade and other receivables
	  	 	(9,229	) 	 	 	(1,538	) 
	 Financial and other assets
	  	 	(603	) 	 	 	(380	) 
	 Income tax receivable
	  	 	(24	) 	 	 	(1,753	) 
	 Inventories
	  	 	1,730	 	 	 	(6,026	) 
	 Accounts payable and accrued liabilities
	  	 	3,957	 	 	 	(2,061	) 
	 Income taxes payable
	  	 	(4,059	) 	 	 	(166	) 
	 Other liabilities
	  	 	574	 	 	 	501	 
	 	  	 	(7,654	) 	 	 	(11,423	) 

 During the three months ended March 31, 2017, the non-cash changes in liabilities arising
from financing activities were $601 relating to $399 of foreign exchange losses on translating the FIFOMI loan from Mexican Pesos to US dollars, and $202 of amortization of transaction costs on the BCP loans. 

  

	
	
23 | Page

 Sierra Metals Inc. 

Notes to the Condensed Interim Consolidated Financial Statements 

For the three months ended March 31, 2017 
 (In
thousands of United States dollars, unless otherwise stated, unaudited) 
  

 

	16	 Contingencies 

The Company and its subsidiaries have been named as defendants in certain actions incurred in the normal course of business. In all
cases the Company and its subsidiaries will continue to vigorously defend the actions and an accrual has been made in the consolidated financial statements for matters that are probable and can be reliably estimated. 

The contingencies outstanding associated with our Mexican subsidiaries are as follows: 

 

	 	a)	 In October 2009, Polo y Ron Minerals, S.A. de C.V. (“P&R”) sued the Company and one of its subsidiaries,
Dia Bras Mexicana S.A. de C.V. P&R claimed damages for the cancelation of an option agreement (the “Option Agreement”) regarding the San Jose properties in Chihuahua, Mexico (the “San Jose Properties”). The Company believes
that it has complied with all of its obligations pertaining to the Option Agreement. In October 2011, the 8th Civil Court of the Judicial District of Morelos in Chihuahua issued a resolution that absolved the Company from the claims brought against
it by P&R on the basis that P&R did not provide evidence to support any of its claims. P&R appealed this resolution to the State Court, which overruled the previous resolution and ordered the Company to: (i) transfer to P&R 17
mining concessions from the Company’s Bolivar project, including the mining concessions where both mine operations and mineral reserves estimates are located; and (ii) pay $422,674 to P&R. In February 2013, a Federal Court in the State
of Chihuahua granted the Company a temporary suspension of the adverse resolution issued by the State Court of Chihuahua, Mexico. On February 12, 2016 The Second Federal Collegiate Court of Civil and Labor Matters, of the Seventeenth circuit in
the State of Chihuahua, (“the Federal Court”) issued a new judgment ruling that the State Court lacked jurisdiction to rule on issues concerning mining titles, and that no previous rulings by the State Court against the Company shall
stand. They ordered the cancellation of the previous adverse resolution by the state Court. The Company will continue to vigorously defend this claim. Sierra Metals continues to believe that the original claim is without merit.

 

	 	b)	 In 2009, a personal action was filed in Mexico against DBM by an individual, Ambrosio Bencomo Muñoz as
administrator of the intestate succession of Ambrosio Bencomo Casavantes y Jesus Jose Bencomo Muñoz, claiming the annulment and revocation of the purchase agreement of two mining concessions, Bolívar III and IV between Minera Senda de
Plata S.A. de C.V. and Ambrosio Bencomo Casavantes, and with this, the nullity of purchase agreement between DBM and Minera Senda de Plata S.A. de C.V. In June 2011, the Sixth Civil Court of Chihuahua, Mexico, ruled that the claim was unfounded and
dismissed the case, the plaintiff appealed to the State Court. The process is in the appealing court. The Company will continue to vigorously defend this action and is confident that the claim is of no merit. 

  

	
	
24 | PageEX-4.5

 Exhibit 4.5 
  

 
 SIERRA METALS INC. 

MANAGEMENT’S DISCUSSION AND ANALYSIS 

FOR THE THREE MONTHS ENDED MARCH 31, 2017 
  

 
  
  

			
	Corporate Office	  	TSX: SMT
	 Suite 2100, 79 Wellington St W.
	  	BVL: SMT
	 Toronto, ON, Canada M5K 1H1
	  	     

www.sierrametals.com

     TABLE OF CONTENTS 

 

							
	 1.
	 	 INTRODUCTION
	  	 	3	 
			
	 2.
	 	 COMPANY OVERVIEW
	  	 	3	 
			
	 3.
	 	 Q1 2017 OPERATING AND FINANCIAL HIGHLIGHTS
	  	 	4	 
			
	 4.
	 	 OUTLOOK
	  	 	13	 
			
	 5.
	 	 RESULTS OF OPERATIONS
	  	 	19	 
			
	 6.
	 	 SUMMARIZED FINANCIAL RESULTS
	  	 	31	 
			
	 7.
	 	 QUARTERLY FINANCIAL REVIEW
	  	 	35	 
			
	 8.
	 	 LIQUIDITY AND CAPITAL RESOURCES
	  	 	36	 
			
	 9.
	 	 SAFETY, HEALTH AND ENVIRONMENT
	  	 	38	 
			
	 10.
	 	 OTHER RISKS AND UNCERTAINTIES
	  	 	38	 
			
	 11.
	 	 NON-IFRS PERFORMANCE MEASURES
	  	 	39	 
			
	 12.
	 	 CRITICAL ACCOUNTING POLICIES AND ESTIMATES
	  	 	44	 
			
	 13.
	 	 OFF BALANCE SHEET ARRANGEMENTS
	  	 	47	 
			
	 14.
	 	 DISCLOSURE CONTROLS AND INTERNAL CONTROLS OVER FINANCIAL REPORTING (“ICFR”)
	  	 	47	 
			
	 15.    
	 	 CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS
	  	 	48	 

 1. INTRODUCTION 

This Management’s Discussion and Analysis (“MD&A”) should be read in conjunction with Sierra Metals Inc.’s (the
“Company” or “Sierra” or “Sierra Metals”) unaudited condensed interim consolidated financial statements for the three months ended March 31, 2017 (“Q1 2017”) and related notes thereto (the “Financial
Statements”), which have been prepared in accordance with International Financial Reporting Standards (“IFRS”), as issued by the International Accounting Standards Board (“IASB”). References herein to “$” are to
the United States dollar and “C$” are to the Canadian dollar and all tabular amounts are expressed in thousands of $ unless otherwise stated. All information contained in this MD&A is current as of May 11, 2017 unless otherwise
noted. The Company’s common shares (the “Common Shares”) are listed and traded on the Toronto Stock Exchange (the “TSX”) and the Peruvian Bolsa de Valores de Lima (“BVL” or the “Lima Stock Exchange”)
under the symbol “SMT”. Additional information relating to the Company, including the Company’s Annual Information Form (“AIF”), is available on SEDAR at www.sedar.com and on the Company’s website at
www.sierrametals.com. A cautionary note regarding forward-looking information follows this MD&A. 
 QUALIFIED PERSON 

Gordon Babcock B.Sc., P. ENG., Chief Operating Officer, Sierra Metals, is the qualified person as defined in National Instrument 43-101 (“NI
43-101”) relating to operational scientific and technical information of Sierra Metals which have been included in this MD&A. 
 Gordon
Babcock B.Sc., P. ENG., Chief Operating Officer, Sierra Metals is the qualified person as defined in NI 43-101, who supervised the preparation of the information related to mineral exploration for Sierra Metals’ Mexican properties included in
this MD&A. 
 2. COMPANY OVERVIEW 
 Sierra Metals is a
Canadian and Peruvian listed mining company focused on the production, exploration and development of precious and base metals in Peru and Mexico. The Company plans to continue growing its production base through brownfield exploration investments
within its properties. The Company’s key priorities are to provide high returns on invested capital, to generate strong cash flows and to maximize shareholder value. The Company has three producing mining properties and manages its business on
the basis of the geographical location of its mining projects. The Peruvian Operation (“Peru”) is comprised of the Yauricocha mine (“Yauricocha” or the “Yauricocha Mine”), located in the province of Yauyos, its
near-mine concessions, and exploration and early stage properties. The Mexican Operation (“Mexico”) includes the Bolivar (“Bolivar’ or the “Bolivar Mine”) and Cusi (“Cusi” or the “Cusi Mine”) mines,
both located in Chihuahua State, Mexico, their near-mine concessions, and exploration and early stage properties. The Company’s strategic focus is currently on its operations, improving efficiencies, as well as pursuing growth opportunities at,
and surrounding, its operating projects. The Company is also considering other opportunities to add value and expand through external growth. Exploration remains a key aspect of the improvement programs being implemented at all three of the
Company’s mines and there is optimism that these brownfield exploration programs will continue to add high value tonnage going forward. Examples of this can be seen at Yauricocha with the Esperanza, Cuye-Mascota zones, at Bolivar, with the
Bolivar West and Northwest zones, as well as at Cusi, with the recently announced Santa Rosa de Lima Zone. These results provide potential to further grow mineral resources and enhance shareholder value. 

  
 3 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 3. Q1 2017 OPERATING AND FINANCIAL HIGHLIGHTS 

 

									
	  	 	Three Months Ended	 
	(In thousands of dollars, except per share and cash cost amounts, consolidated
figures unless noted otherwise)	 	March 31, 2017    	 	 	March 31, 2016    	 
	
Operating
	 	 	 	 	 	 	 	 
	 Ore Processed / Tonnes Milled
	 	 	529,695	 	 	 	476,220	 
	 Silver Ounces Produced (000’s)
	 	 	698	 	 	 	588	 
	 Copper Pounds Produced (000’s)
	 	 	7,290	 	 	 	5,836	 
	 Lead Pounds Produced (000’s)
	 	 	9,143	 	 	 	8,255	 
	 Zinc Pounds Produced (000’s)
	 	 	18,137	 	 	 	10,919	 
	 Gold Ounces Produced
	 	 	1,777	 	 	 	2,236	 
	 Copper Equivalent Pounds Produced (000’s)1
	 	 	26,086	 	 	 	20,309	 
	 Silver Equivalent Ounces Produced (000’s)1
	 	 	3,050	 	 	 	2,375	 
	 	 	 
	 Cash Cost per Tonne Processed
	 	$	39.84	 	 	$	41.57	 
	 Cost of sales per AgEqOz
	 	$	8.71	 	 	$	9.12	 
	 Cash Cost per AgEqOz2
	 	$	8.23	 	 	$	9.12	 
	 AISC per AgEqOz2
	 	$	12.84	 	 	$	16.33	 
	 Cost of sales per CuEqLb2
	 	$	1.02	 	 	$	1.07	 
	 Cash Cost per CuEqLb2
	 	$	0.96	 	 	$	1.07	 
	 AISC per CuEqLb2
	 	$	1.50	 	 	$	1.91	 
	 	 	 
	 Cash Cost per AgEqOz (Yauricocha)2
	 	$	7.39	 	 	$	8.69	 
	 AISC per AgEqOz (Yauricocha)2
	 	$	10.60	 	 	$	15.16	 
	 Cash Cost per CuEqLb (Bolivar)2
	 	$	1.14	 	 	$	1.41	 
	 AISC per CuEqLb (Bolivar)2
	 	$	1.89	 	 	$	2.35	 
	 Cash Cost per AgEqOz (Cusi)2
	 	$	10.82	 	 	$	3.88	 
	 AISC per AgEqOz (Cusi)2
	 	$	22.72	 	 	$	12.88	 
	
Financial
	 	 	 	 	 	 	 	 
	 Revenues
	 	$	54,518	 	 	$	23,740	 
	 Adjusted EBITDA2
	 	$	25,361	 	 	$	4,373	 
	 Operating cash flows before movements in working
capital
	 	$	22,800	 	 	$	5,010	 
	 Adjusted net income (loss) attributable to
shareholders2
	 	$	10,990	 	 	$	(1,967	) 
	 Net income (loss) attributable to
shareholders
	 	$	2,558	 	 	$	(5,116	) 
	 Cash and cash equivalents
	 	$	37,959	 	 	$	19,147	 
	 Working
capital
	 	$	                    12,442	 	 	$	                    11,920	 

 (1) Silver equivalent ounces and copper equivalent pounds were calculated using
the following metal prices: $19.50/oz Ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au. Budgeted Ag price used in equivalent ounce/pound calculations is higher than the Company’s realized selling prices during 2017, and thus, has caused
AgEq cost metrics to be higher than those actually realized. 
 (2) This is a non-IFRS
performance measure, see Non-IFRS Performance Measures section of the MD&A. 
 Q1 2017 Operational Highlights and Growth Initiatives 

During the first quarter of 2017, consolidated metal production increased 28% compared to Q1 2016. The increase in metal production was due to higher
throughput, higher silver, copper and zinc head grades as well as higher recoveries for all metals, except gold, at Yauricocha. Additionally, the Company saw higher throughput and recoveries of all metals at Bolivar but this was partially offset by
lower throughput, head grades and recoveries of all metals at Cusi. 
 The Company reported solid improvements in metals production and tonnage
processed in Q1 2017, led by the Yauricocha Mine, which recently completed several key aspects of a successful restructuring, and rehabilitation program. Work continues at all of our mines to improve operations, best practices, introduce modern
equipment, and improve head grades. Management believes that these changes will serve to increase production and improve head grades for 2017 and the years to come. 

  
 4 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Brownfield exploration programs remains a key aspect at all three of our mines and we are very
optimistic that they will continue to add high value tonnage going forward. Examples of this can be seen at Yauricocha with the Esperanza, Cuye-Mascota zones, at Bolivar with the Bolivar West and Northwest zones as well as at Cusi with the recently
announced Santa Rosa de Lima Zone. When combined with our continued production optimization program, it should lead to substantial growth, not only in production with lower costs, but most importantly in shareholder value. 

Q1 2017 Consolidated Production Highlights 
  

	 	•	 	 Silver (“Ag”) equivalent production of 3.0 million ounces (“oz”); a 28% increase from Q1 2016;

  

	 	•	 	 Copper (“Cu”) equivalent production of 26.1 million pounds (“lb”); a 28% increase from Q1 2016;

  

	 	•	 	 Total of 529,695 tonnes processed; an 11% increase from Q1 2016 production; 

 

	 	•	 	 Increase of 54% in silver equivalent production and 21% increase in throughput at Yauricocha during Q1 2017 vs Q1 2016

 Q1 2017 Consolidated Financial Highlights 
  

	 	•	 	 Revenue from metals payable of $54.5 million in Q1 2017 increased by 130% from $23.7 million in Q1 2016. Higher revenues
are primarily attributable to the 11% increase in throughput, the increase in silver, copper, and lead head grades, and higher recoveries for all metals, except gold, at Yauricocha; the 11% increase in throughput and higher recoveries for all metals
at Bolivar; and the increase in the prices of silver (16%), copper (24%), lead (30%), zinc (65%), and gold (2%) in Q1 2017 compared to Q1 2016; this was partially offset by a 31% decrease in throughput and lower head grades and recoveries for
all metals at Cusi; 

  

	 	•	 	 Yauricocha’s cost of sales per silver equivalent payable ounce was $8.26 (Q1 2016 - $8.81), cash cost per silver
equivalent payable ounce was $7.39 (Q1 2016 - $8.69), and all-in sustaining cash cost (“AISC”) per silver equivalent payable ounce was $10.60 (Q1 2016 - $15.16) for Q1 2017 compared to the same period in 2016. The decrease in the AISC per
silver equivalent payable ounce during Q1 2017 was due to an increase in silver equivalent payable ounces as a result of higher throughput and ore feed head grades from the increase in available production from higher grade zones in the Mine. Also,
lower treatment and refining costs were incurred during Q1 2017 resulting from improved terms within re-negotiated sales contracts with our off-takers; 

  

	 	•	 	 Bolivar’s cost of sales per copper equivalent payable pound was $1.16 (Q1 2016 - $1.28), cash cost per copper
equivalent payable pound was $1.14 (Q1 2016 - $1.41), and AISC per copper equivalent payable pound was $1.89 (Q1 2016 - $2.35) for Q1 2017 compared to the same period in 2016. The decrease in the AISC per copper equivalent payable pound during Q1
2017 was due to an increase in copper equivalent payable pounds as a result of 11% higher throughput, and higher recoveries realized for all metals, offset an 

  
 5 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

	 	 
increase of $0.3M in sustaining capital expenditures related to mine development and equipment purchases; 

 

	 	•	 	 Cusi’s cost of sales per silver equivalent payable ounce was $8.53 (Q1 2016 - $6.15), cash cost per silver
equivalent payable ounce was $10.82 (Q1 2016 - $3.88), and AISC per silver equivalent payable ounce was $22.72 (Q1 2016 - $12.88) for Q1 2017 compared to the same period in 2016. AISC per silver equivalent payable ounce increased due to the increase
of $0.4M in sustaining capital expenditures related to stope and drift development within the mine during Q1 2017 as the Company is currently re-evaluating its development plan following a successful reinterpretation of the mine’s geology. The
decline in throughput and silver head grades and recoveries resulted in fewer silver equivalent payable ounces which also contributed to the higher AISC per silver equivalent payable ounce in Q1 2017 compared to Q1 2016; 

 

	 	•	 	 Adjusted EBITDA (1) of $25.4 million for Q1 2017 increased
compared to $4.4 million in Q1 2016. The increase in adjusted EBITDA in Q1 2017 was primarily due to the $26.0 million increase in revenues at Yauricocha, discussed previously; 

 

	 	•	 	 Net income (loss) attributable to shareholders for Q1 2017 was $2.6 million (Q1 2016: $(5.1) million) or $0.02 per share
(basic and diluted) (Q1 2016: $(0.03)); 

  

	 	•	 	 Adjusted net income attributable to shareholders (1) of $11.0
million, or $0.07 per share, for Q1 2017 increased compared to adjusted net loss of $(2.0) million, or $(0.01) per share for Q1 2016; 

  

	 	•	 	 A large component of the net income (loss) for every period is the non-cash depletion charge in Peru, which was $9.2
million for Q1 2017 (Q1 2016: $4.8 million). The non-cash depletion charge is based on the aggregate fair value of the Yauricocha mineral property at the date of acquisition of Corona of $371.0 million amortized over the total proven and probable
reserves of the mine. The increase in the non-cash depletion charge in Q1 2017 was due to the reduction in proven and probable reserves reported in the Company’s NI 43-101 Technical Report issued on August 11, 2016. Also, the increase in
tonnes mined during Q1 2017 compared to Q1 2016 resulted in a higher depletion charge; 

  

	 	•	 	 Cash flow generated from operations before movements in working capital of $22.8 million for Q1 2017 increased compared
to $5.0 million in Q1 2016. The increase in operating cash flow is mainly the result of higher revenues generated and higher gross margins realized; and 

  

	 	•	 	 Cash and cash equivalents of $38.0 million and working capital of $12.4 million as at March 31, 2017 compared to
$42.1 million and $9.6 million, respectively, at the end of 2016. Cash and cash equivalents have decreased by $4.2 million during Q1 2017 due to $11.0 million of operating cash flows being offset by capital expenditures incurred in Mexico and Peru
of $(9.8) million, repayment of loans, credit facilities and interest of $(5.2) million, and dividends paid to non-controlling interest shareholders of $(0.5) million. Included in the $11.0 million of operating cash flows were negative changes in
non-cash working capital items of $7.7 million due to the increase accounts receivable as at March 31, 2017. 

(1) This is a non-IFRS performance measure, see non-IFRS Performance Measures
section of this MD&A. 

  
 6 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Project Development 
  

	 	•	 	 The Company announced the discovery of a new high-grade oxide zone, referred to as the Esperanza North zone, which is
located between the Esperanza zone and Cachi-Cachi Mine at Yauricocha; 

  

	 	•	 	 The Company also announced drilling results demonstrating the extension of the high-grade sulfide zone, referred to as
the Cuye-Mascota zone, discovered in November 2016; 

  

	 	•	 	 The new discoveries come as part of an ongoing brownfield drilling program that is testing priority targets at the
Yauricocha, and all drilling will be included in an upcoming Mineral Resource and Reserve Estimate report that is expected to be published in the fourth quarter of 2017; 

 

	 	•	 	 On March 6, 2017 the Company announced the results of the initial drill program on the Bolivar property in
Chihuahua State, Mexico which continues to define high grade silver-gold, and polymetallic mineralization within the La Sidra vein; 

  

	 	•	 	 Filed an updated NI 43-101 compliant Mineral Reserve and Resource Report for the Company’s Bolivar Mine on
April 19, 2017; 

  

	 	•	 	 Filed an updated NI 43-101 compliant Mineral Resource Report for the Company’s Cusi Mine on April 17, 2017;

  

	 	•	 	 Mine development at Bolívar during Q1 2017 totaled 808 meters. Most of these meters (497) were developed to
prepare stopes for mine production. The remainder of the meters (311) were related to the deepening of ramps and developing service ramps to be used for ventilation and pumping; and 

 

	 	•	 	 During Q1 2017, at the Cusi property, mine development totaled 2,145 meters, and 2,242 meters of infill drilling was
carried out inside the Mine. 

 Recent Developments 
  

	 	•	 	 On April 6, 2017 the Company announced the appointment of Igor Gonzales as President and Chief Executive Officer,
effective May 1, 2017. Mr. Gonzales has served on the Sierra Metals Board of Directors since September 2013. 

  
 7 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Exploration Highlights 

Peru: 
 During Q1 2017, the Company drilled 80 holes totaling 11,711 meters
at Yauricocha. The drilling included the following: 
 Exploration Drilling: 

	 	•	 	 Esperanza: 6 horizontal holes totaling 2,254 meters to explore the continuity of mineralization at depth

	 	•	 	 Mina Cachi Cachi (Escondida Level 870): 13 holes totaling 2,754 meters to explore new mineralized zones;

 Definition Drilling: 

	 	•	 	 Rosaura (Level 920): 15 holes totaling 2,063 meters to define floor 8 on level 970 of the Rosaura orebody;

	 	•	 	 Catas (1020 level): 21 holes with a length of 2,222 meters of definition drilling to determine which sections of the
orebody have the highest mineralized content; 

	 	•	 	 Marita (1020 level): 4 holes totaling 768 meters to further define the orebody; 

	 	•	 	 Mascota (1070 level): 4 horizontal holes totaling 336 meters to provide further certainty on the copper oxides within
the orebody; 

	 	•	 	 Contacto Oriental 2 (1020 level): 10 holes totaling 516 meters to further define the orebody; 

	 	•	 	 Cuerpos Pequenos (silver, lead and zinc) 1 (1070 level): 7 holes totaling 798 meters of definition drilling to verify
whether the orebody reached the 1070 level. 

 Discovery of New Esperanza North Zone and Drill Results at the Cuye-Mascota Zone 

On May 1, 2017 the Company announced the discovery of a new high-grade lead and silver oxides zone, referred to as the Esperanza North zone, which
is located between the Esperanza zone and Cachi-Cachi Mine. The Company also announced drilling results which demonstrate the extension of the high-grade sulfide zone, referred to as the Cuye-Mascota zone which was discovered in November 2016.
Results included 69 meters of continuous sulfide mineralization. This zone is located 200 meters north of the central mine area, along strike from current mining activities. The new discovery and extension come as part of an ongoing brownfield
drilling program that is testing priority targets at the Yauricocha Mine located 150 kilometers east southeast of Lima in the Yauricocha Mining District (Cordillera Occidental), Peru. All drilling that has taken place will be included in an upcoming
Mineral Resource and Reserve Estimate report that is expected to be published for the Yauricocha Mine early in the fourth quarter of 2017. 
 The drilling program
delineating extensions of the Cuye-Mascota zone include: 
  

	 	•	 	 Hole Mas-30: 68.9 meters of 32.5g/t Ag, 1.43% Cu, 3.28% Zn, 0.70g/t Au; including 29.6 meters of 2.0% Cu, 0.9g/t
Au; and 7.9 meters of 18.7% Zn, 62.6g/t Ag 

  

	 	•	 	 Hole Mas-31: 12.0 meters of 6.6% Cu, 5.7% Zn, 24.9g/t Ag; and 2.8 meters of 456g/t Ag, 26.0% Pb, 19.0% Zn

  
 8 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

	 	•	 	 Hole Mas-33: 24.6 meters of 8.3% Cu, 3.2% Zn; and 21.0 meters of 3.5% Cu, 6.0% Zn, 132g/t Ag 

Esperanza North New Discovery Drill hole highlights include: 
  

	 	•	 	 Hole ESP-02: 0.5 meters of 2,050.0g/t Ag, 30% Pb; and 3.0 meters of 465.27g/t Ag, 1.99% Zn, 16.29% Pb, 5.84g/t Au

  

	 	•	 	 Hole ESP-03: 2.4 meters of 985.21g/t Ag, 30% Pb, 2.40g/t Au 

 

	 	•	 	 This discovery is approximately in the mid-point between the Esperanza orebody discovered in early 2016 and the Cachi
Cachi Mine 

  

	 	•	 	 This area had never been drilled before and the discovery is important for the interpretation of the orebody extensions
between Esperanza and Cachi Cachi which are one kilometer apart 

 Drilling for the new Esperanza North zone took place from the
Yauricocha tunnel which is located on the 720 level as the company drilled between limestone (Jumasha) and Granodioritic intrusive with an objective of identifying the contact face. 

The Cuye orebody had been previously mined down from surface to the 870m level horizon of the Yauricocha mine and it used to be one of the main cashflow
generators 10 years ago at Yauricocha. The orebody historically was predominantly a copper sulfide deposit which shrank to only many small structures below the 870 level. Exploration carried out during 2011 and 2012 was unsuccessful between the 870m
and 1020m level horizon, which was the lowest level Company geologists could drill at that time. The results of the current drilling program on the 1070 level confirm according to the mine geologists that the Cuye orebody continues at depth to below
the 1270 level. Geologists have also identified the transition zone of oxides to fresh lead, zinc and silver sulfide mineralization in this drilling program which also has an important economic relevance to its high grades, particularly for zinc and
copper. 
 The diamond drill intercepts at the Cuye Ore Body are some of the widest intercepts of sulfide mineralization in the Company ́s recent
history. This ore body is of the replacement type, it is embedded in the contact between the Jumasha limestone and the intrusive (monzonitic composition). Within the intrusive, endoskarn horizons are present due to the metasomatic activity in the
contact with the limestone host. In the contact area of the mineralized zones with the intrusive host geologists noted high concentrations of argilites. The minerals present are friable pyrite, chalcopyrite and hydrothermal calcosine in the center
of the ore body, with sphalerite and galena in lower proportions, forming a halo around the limestone contact. Diamond drill core logs have shown evidence of intrusions of dioritic composition, apparently younger than the monzonitic intrusions,
which are responsible for the mineralized fluids and ore body formation in the Cuye Area. It will be a priority for the Company to continue exploring the Cuye Area during the rest of 2017. 

  
 9 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Table 1 - Length Weighted Composite Intervals for Cuye-Mascota 

 

																						
	 Hole No.
	  	From  	  	To  	  	
Width  
 (m)  
	  	
Ag  
 (g/t)  
	  	
Pb  
 (%)  
	  	
Cu  
 (%)  
	  	
Zn  
 (%)  
	  	
Au  
 (g/t)  
	  	Description
	
MAS-30
	  	101.30  	  	110.00  	  	8.70  	  	3.22  	  	0.08  	  	3.01  	  	19.31  	  	0.01  	  	Oxides Copper
	 	  	113.70  	  	118.00  	  	4.30  	  	1.84  	  	0.10  	  	4.83  	  	18.42  	  	0.01  	  	Oxides Copper
	 	  	215.60  	  	224.60  	  	9.00  	  	69.60  	  	0.31  	  	0.26  	  	13.96  	  	0.23  	  	Sulphides
	 	  	240.70  	  	244.50  	  	3.80  	  	96.45  	  	0.18  	  	0.05  	  	0.17  	  	0.29  	  	Pyrite
	 	  	281.70  	  	350.60  	  	68.90  	  	32.50  	  	0.10  	  	1.43  	  	3.28  	  	0.70  	  	Sulphides
	
MAS-31
	  	117.35  	  	129.70  	  	12.35  	  	24.87  	  	0.19  	  	6.56  	  	5.71  	  	0.02  	  	Oxides Copper
	 	  	143.10  	  	148.10  	  	5.00  	  	7.94  	  	0.36  	  	2.11  	  	9.12  	  	0.01  	  	Oxides
	 	  	169.50  	  	172.30  	  	2.80  	  	455.64  	  	26.32  	  	0.28  	  	19.20  	  	0.65  	  	Sulphides
	 	  	288.40  	  	289.25  	  	0.85  	  	31.50  	  	0.02  	  	2.59  	  	0.13  	  	0.05  	  	Copper
	
MAS-33
	  	112.95  	  	130.20  	  	17.25  	  	23.61  	  	0.86  	  	8.59  	  	4.10  	  	0.07  	  	Oxides Copper
	 	  	132.60  	  	137.50  	  	4.90  	  	1.86  	  	0.12  	  	11.44  	  	1.42  	  	0.01  	  	Oxides Copper
	 	  	156.50  	  	160.00  	  	3.50  	  	326.57  	  	19.70  	  	2.42  	  	1.74  	  	4.15  	  	Oxides Ag-Pb
	 	  	160.00  	  	172.00  	  	12.00  	  	40.76  	  	2.27  	  	4.69  	  	1.47  	  	0.41  	  	Oxides Copper
	 	  	172.00  	  	177.80  	  	5.80  	  	204.34  	  	5.41  	  	1.81  	  	3.06  	  	1.59  	  	Oxides. Ag-Pb
	 	  	177.80  	  	185.10  	  	7.30  	  	114.54  	  	4.08  	  	0.10  	  	8.64  	  	1.21  	  	Sulphides
	 	  	310.00  	  	313.50  	  	3.50  	  	44.03  	  	0.03  	  	2.36  	  	0.19  	  	0.28  	  	Copper
	 	  	313.50  	  	331.70  	  	18.20  	  	189.89  	  	2.45  	  	2.74  	  	13.27  	  	1.01  	  	Polymetallic
	 	  	337.70  	  	339.50  	  	1.80  	  	27.54  	  	0.06  	  	0.67  	  	0.47  	  	0.95  	  	Pyrite
	  
 Table 2 - Length Weighted Composite Intervals for Esperanza
North
  

	 Hole
No.
	  	From  	  	To  	  	 Width  

(m)  
	  	 Ag  

(g/t)  
	  	 Pb  

(%)  
	  	 Cu  

(%)  
	  	 Zn  

(%)  
	  	 Au  

(g/t)  
	  	Description
	 ESP-02
	  	388.90  	  	389.40  	  	0.50  	  	2050.0  	  	30.00  	  	0.01  	  	0.21  	  	0.30  	  	Sulphides
	 	  	389.40  	  	392.40  	  	3.00  	  	465.27  	  	16.29  	  	0.13  	  	1.99  	  	5.84  	  	Oxides
	 	  	392.40  	  	396.00  	  	3.60  	  	10.37  	  	0.05  	  	0.00  	  	3.94  	  	0.02  	  	Marble Oxides
	 	  	396.00  	  	398.50  	  	2.50  	  	27.38  	  	0.78  	  	0.02  	  	2.00  	  	0.79  	  	Oxides
	 ESP-03
	  	462.15  	  	464.30  	  	2.15  	  	985.21  	  	30.00  	  	0.03  	  	0.15  	  	2.40  	  	Oxides

 All reported intercepts are core length as further drilling is required to determine true thicknesses. 

  
 10 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Mexico: 

Bolivar 

	 	•	 	 At Bolívar during Q1 2017, 3,189 meters were drilled in the following areas: 1,051 meters in the El Gallo area
with the objective of finding the continuation of the El Gallo Inferior orebody between the Mina de Fierro and the Bolivar Mine; and 2,138 meters were drilled at Bolivar Northwest; 

	 	•	 	 A Titan 24 geophysical survey was performed during Q1 2017 in the area of Bolívar NW and Bolivar West,

 Definition of High Grade Silver-Gold Mineralization at the La Sidra Zone and High Grade Copper at the Bolivar West Zone 

On March 6, 2017 the Company announced the results of the initial drill program on the Bolivar property in Chihuahua State, Mexico and continues to
define high grade silver-gold and polymetallic mineralization within the La Sidra vein. The mineralized zone currently extends to over 500 meters in length and to 300 meters in depth and is still open along strike and down dip. 

Drilling programs also continue at Bolivar West with future plans to drill Bolivar North West (skarn ore deposit area) to define high grade copper with
coincident strong chargeability and within resistivity zones detected during a recently completed a 400 hectare Titan 24 Induced Polarization (‘IP’) survey conducted by Quantec Geosciences of Toronto, Ontario. 

A planned 20,000-metre drilling program has been budgeted with 9,500 meters of In-fill drilling planned at La Sidra and 11,500 meters at Bolivar West
and Bolivar NorthWest. Currently drilling is being conducted on Bolivar West zone. The purpose of these programs is to define existing known areas. Once final results are available from the geophysical program, further drilling programs will be
carried out. 
 La Sidra Zone Drill hole highlights include: (for a complete table of drill results please see Company press release
dated March 6, 2016) 
  

													
	 Hole No.
	  	True Width (m)	  	CuEQ (%)	  	Ag (g/t)	  	Pb (%)	  	Zn (%)	  	Au (g/t)
							
	 DB14B460:
	  	3.5	  	9.22	  	717	  	0.39	  	1.31	  	0.76
	 DB14B462:
	  	9.7	  	10.63	  	390	  	1.88	  	4.99	  	4.05
	 DB15B490:
	  	1.7	  	10.60	  	537	  	1.17	  	1.66	  	3.92
	  
 Bolivar West Zone Drill hole highlights include:

 

	 Hole No.
	  	True Width (m)	  	CuEQ (%)	  	Ag (g/t)	  	Cu (%)	  	Zn (%)	  	Au (g/t)
							
	 DB15B516:
	  	9.2	  	4.05	  	69	  	2.34	  	2.02	  	0.07
	 DB16B526:
	  	15.6	  	2.46	  	41	  	1.39	  	0.77	  	0.33
	 DB16B538:
	  	19.0	  	2.00	  	32	  	1.66	  	0.02	  	0.00
	 DB16B549:
	  	10.5	  	4.26	  	60	  	2.70	  	0.02	  	1.17

  
 11 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Cusi: 
  

	 	•	 	 The Company drilled 1,076 meters from surface related to the San Ignacio and San Rafael veins. 

Discovery of Significant High-Grade Zone at Cusi Silver Mine in Mexico 

On February 27, 2017 the Company announced the discovery of new high grade silver intercepts occurring in the Santa Rosa de Lima complex located
within the current Cusi Mine operational area. The Santa Rosa de Lima complex lies within a regional structure extending some 64 kilometers. Extension on the Cusi property has an anticipated length of 12 kilometers. The discovery comes as part of a
reinterpretation of the Hydrothermal model and a drilling campaign consisting of 15,000 meters which began in December 2016 and has now been completed. The structural mineralization widths from this program range from 1.5 meters to 10.0 meters with
an average width of 4.16 meters. Full results from the program are expected to be released in late June 2017. Subsequent to the completion of the initial drilling campaign, the Company has also commenced an additional drilling campaign consisting of
15,000 meters of infill drilling which is approximately 25% complete. 
 The mineralization at the Santa Rosa de Lima structure is located 100 meters
below the surface, and can occasionally be observed at surface at the intersections of veins like “Promontorio” and “Santa Edwiges”. 

Historical Drill hole highlights include: 
  

													
	 Hole No.
	  	True Width (m)	  	EQAg (g/t)	  	Ag (g/t)	  	Pb (%)	  	Zn (%)	  	Au (g/t)
							
	 Cusi-628:
	  	20.0	  	287	  	266	  	0.22	  	0.21	  	0.06
	 Cusi-509
	  	12.0	  	794	  	758	  	0.36	  	0.33	  	0.13
	 Cusi-551
	  	6.0	  	374	  	358	  	0.26	  	0.16	  	0.00
	 Cusi-575
	  	5.0	  	860	  	709	  	2.12	  	1.31	  	0.03
	  
 Current Drill hole highlights include:

 

	 Hole No.
	  	True Width (m)	  	EQAg (g/t)	  	Ag (g/t)	  	Pb (%)	  	Zn (%)	  	Au (g/t)
							
	 Cusi-2
	  	3.2	  	351	  	332	  	0.20	  	0.18	  	0.06
	 Cusi-4
	  	3.9	  	298	  	167	  	2.25	  	1.25	  	0.00
	 Cusi-5
	  	2.5	  	218	  	200	  	0.12	  	0.14	  	0.12
	 Cusi-6
	  	1.5	  	1243	  	1152	  	0.26	  	0.52	  	0.85
	 Cusi-14
	  	3.1	  	1126	  	1034	  	1.50	  	2.00	  	0.00

 A program of 15,000 meters of drilling is currently in progress. This program is targeted to investigate an area of one
kilometer in length and 500 meters in depth in the target area defined by the previous drill holes. Drilling to date demonstrates that mineralization is consistent across the assessed area and lies between 1,850 and 1,500 meters above sea level (150
to 550 meters below surface) in depth. 

  
 12 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Drilling will continue along the Santa Rosa de Lima Zone to the NW and SE in subsequent programs as the
possibility exists to define a 12 kilometer zone. 
 The discovery and evaluation to date of the Santa Rosa de Lima zone demonstrates very important
potential in our operations at the Cusi Mine. We hope in the short term to have a better understanding of the 12 kilometer structural extension containing the Santa Rosa de Lima zone. Intercepts such as those returned in Cusi-6, Cusi-14 and Cusi-509 are common in epithermal deposits of “bonanza” (High grade). 
  

	4.	 OUTLOOK 

The Company is focused on improving operating performance through the production of higher value ore, strengthening its asset base, increasing its
mineral reserves and resources at each of its’ mines, and exploring organic and external growth opportunities to enhance and deliver shareholder value. Sierra is pursuing several initiatives for 2017 in order to meet our objectives of
maintaining production costs in the long-term and increasing ore production values and plant capacity where possible in all operations. Sierra’s restructuring and operational improvement program, which began in Q3 2015 at the Yauricocha Mine,
has successfully addressed the management of water control issues, the improvement of mine sequencing, implementation of best practices and the mechanization of the Mine. The water flow issues are now under control with a drainage program in place
and successfully operating. The Company is effectively moving away from conventional jackleg mining to mechanized jumbo mining. Also, planned shotcrete placement is now at 50% of target and the Company is successfully moving to shotcrete, bolting
with friction bolts and resin rebar bolts, screens and straps for improved ground support. Steel set installations have also been reduced by over 50% on a monthly basis. 

The Company’s emphasis at Yauricocha will continue to be on the production of higher value ore, including an estimated 200,000 tonnes of ore feed
from the Esperanza Zone during 2017. This effort is expected to continue to improve the Company’s operating margins and cash flow generation within a recently improved, but historically softer metals price environment. 

The Company plans to continue to focus on encouraging drilling results which demonstrated the extension of the high-grade sulfide zone, referred to as
the Cuye-Mascota zone which was discovered in November 2016. This zone is located 200 meters north of the central mine area, along strike from current mining activities. The new discovery and extension come as part of an ongoing brownfield drilling
program that is testing priority targets at the Yauricocha Mine. All drilling that has taken place will be included in an upcoming Mineral Resource and Reserve Estimate report that is expected to be published for the Yauricocha Mine early in the
fourth quarter of 2017. 
 Similar to our Esperanza discovery in early 2016, the high-grade Cuye-Mascota zone is in close proximity to our existing
operations, which make their economic potential more meaningful. The Company has made a strong commitment to brownfield exploration in 2017 and the results demonstrate the strong potential to further grow mineral reserves and resources through
further infill and exploration drilling. Continued exploration programs are planned with an aim to add high value tonnage going forward in 2017 as the drilling focuses on new discoveries and expansion of areas in close proximity to existing
operations. 

  
 13 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Similar to the operational improvement program completed at the Yauricocha Mine in Peru, the Company is
working on a similar program at Bolivar in 2017. The Company’s focus at Bolivar this year will be on efforts that can improve production volume, increase throughput and increase recoveries at the Mill. 

Bolivar mine throughput has grown continually from 400 tonnes per day (tpd) in 2011 to 2,700 tpd currently, and its annual copper equivalent production
has grown from 3.9 million pounds in 2011 to annual copper equivalent production of 21.2 million pounds in 2016. As tonnage production rates have increased at Bolivar, the Company has realized modest reduction in its all-in sustaining
costs, not truly reflecting the economies of scale of tonnage increases. This is primarily due to lower average copper head grades 
 The
Company’s focus at Bolivar during the remainder of 2017 will be on improving production volume through the procurement of new equipment including Jumbos, Scoops and Trucks expected to arrive in stages with full delivery complete by the end of
the third quarter with the intention of moving more material from available production stopes within the mine. 
 The connection of the Agua Caliente
power substation at Bolivar during February 2015 was another step completed in continuing to increase throughput at the Piedras Verdes plant. A mine to mill optimization has been completed, to finalize all steps required to bring the throughput at
Bolivar beyond 2,500 tpd which we hope to achieve during 2017. Partial key equipment purchases have been procured during 2016 in the effort to make this objective a reality. Throughput during Q1 2017 was approximately 2,800 tpd and the Company is
also taking steps to increase the daily throughput to 3,000 tpd during 2017. 
 The Company has been very satisfied with the updated Resource and
Reserve report for the Bolivar Mine released during Q1 2017 and the quality of the defined areas within the Report. A 20,000-meter drill program has been in execution since the latter part of 2016 with a significant portion already completed.
Drilling is taking place at the Bolivar West, Bolivar Northwest and will continue at the La Sidra area. Also, a recently completed geophysical program utilizing Titan 24 techniques has targeted near-surface, coincident strong chargeability (IP) and
resistivity anomalies in the Southwestern sector of the property near Bolivar West. These targets will be drilled with a diamond drilling program and subsequent exploration programs are targeted to increase tonnage and grade at Bolivar. 

At Cusi, the recently released Resource Estimate provides a solid foundation upon which future updates could add further resources and potentially
reserves later this year. Our current drilling program at the Santa Rosa de Lima zone is experiencing very positive results with wider and higher grade structures encountered in the drill intercepts than at those structures historically mined at the
Cusi Mine. We believe this will be a very exciting year for exploration results as a product of our aggressive exploration drilling programs undertaken at Cusi. 

The discovery and evaluation to date of the Santa Rosa de Lima zone demonstrates very important potential in our operations at the Cusi Mine. We hope in
the short term to have a better understanding of the 12 kilometer structural extension containing the Santa Rosa de Lima zone. Intercepts such as those returned in Cusi-6, Cusi-14 and Cusi-509 are common in
epithermal deposits of “bonanza” (High grade). There is reasonable potential to expand the Santa Lima de Rosa zone to depth and along strike to the NW and SE as these areas have never been drill

  
 14 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
tested. We look forward to an exciting future exploring the Santa Lima da Rosa zone and the surrounding district. 

A program of 15,000 meters of drilling was recently completed at Cusi. This program was targeted to investigate an area of one kilometer in length and
500 meters in depth in the target area defined by the previous drill holes. Drilling to date demonstrates that mineralization is consistent across the assessed area and lies between 1,850 and 1,500 meters above sea level (150 to 550 meters below
surface) in depth. 
 Despite the decreases in tonnage and metal production at Cusi it is very important to note that the Company is currently
re-evaluating its development plan at the mine following a successful reinterpretation of the mine’s geology. Management are very encouraged by data from a recently completed 15,000-metre drilling program that was focused on the high-grade
Santa Rosa de Lima zone with a goal of increasing tonnage and grade at Cusi, which was not included in the recently released Mineral Resource Estimate at Cusi (please see news release dated April 13, 2017). Drilling in this area is based on a
new conceptual interpretation of the Santa Rosa de Lima structure at the Cusi Mine. This interpretation is based on exploration drilling of the NW-SE regional structural system and demonstrates that mineralization is consistent across the assessed
area. The structural mineralization widths from this program range from 1.5 meters to 10.0 meters with an average width of 4.16 meters. Full results from the program are expected to be released in late June 2017. Subsequent to the completion of the
initial drilling campaign, the Company has also commenced an additional drilling campaign consisting of 15,000 meters of infill drilling which is approximately 25% complete. 

Management plans to focus on improving head grades and maintaining production at a rate of approximately 400tpd, while stockpiling ore at the plant and
producing it in batches. The Company will be drifting on the Santa Rosa de Lima zone in an effort to improve head grades as well as focus on the reinterpretation of geology at Cusi. 

The Company has a history of strong operating cash flow generation, as evidenced by $22.8 million of operating cash flows before movements in working
capital generated during Q1 2017, and had cash and cash equivalents of $38.0 million, and working capital of $12.4 million as at March 31, 2017. The Company is expending significant efforts to maintain positive cash flow generation from its
existing operations in order to reduce debt levels, fund required capital expenditures, and improve liquidity with the objective of reducing debt levels equal to or less than 1 times EBITDA. The Company continues to believe that its’ treasury
and future cash flows will be adequate to finance the capital expenditures budgeted at each of the three mines. 
 Sierra shareholders approve share consolidation
as predecessor to potential U.S. listing 
 On September 27, 2016, a Special Meeting of Shareholders was held, whereby 98% of Sierra
Metals’ shareholders voted in favour to amend the Company’s articles to allow the consolidation of the issued and outstanding Common Shares of the Corporation on the basis of one post-consolidation Common Share for every two
pre-consolidation Common Shares or such other consolidation ratio that the directors of the Corporation deem desirable. Such ratio is to be no greater than one post-consolidation Common Share for every five pre-consolidation Common Shares. The
Company continues to work towards this U.S. listing and believes it will occur during Q2 2017. 

  
 15 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 U.S. Listing 

Sierra Metals has determined that a listing on a US stock exchange will benefit the Company. However, to qualify for listing the price of the Common
Shares must meet a minimum US$2.00 per share threshold. At the Company’s current share price a share consolidation would not be necessary, however, the Company may need to complete a consolidation designed to increase the price of the Common
Shares. The Company has been pre-approved to list on the New York Stock Exchange (“NYSE”) MKT exchange and continues to work towards this U.S. listing and believes it will occur during Q2 2017. 

Spin-out of Peru Northern Properties 
 Sierra Metals Inc.
shareholders have voted at a special meeting of shareholders on February 16, 2017, to spin-out (the “Spin-out”) to existing shareholders its 100% owned Las Lomas Project, into a proposed new public entity called Cautivo Mining Inc.
(“Cautivo”) by approving a reduction in the capital of the common shares of Sierra Metals for the capital assigned to Cautivo Mining. The final voting results were 99.94% voting in favour of the capital reduction. On the completion of the
Spin-out, Cautivo who are the developer of the properties’ main asset will be its indirect interest in the Las Lomas Project (the “Las Lomas Project”) consisting of approximately 32,000 hectares of greenfield exploration properties
located in northern Peru. The Company is currently in the process of working with the Toronto Securities Exchange in order to receive approval for the spin-out. 

2017 Production and Cost Guidance 
 This section of the
MD&A provides management’s production estimates for 2017. These are “forward-looking statements” and subject to the cautionary note regarding the risks associated with forward-looking statements contained at the end of this
document 
 The Company anticipates 2017 silver equivalent production will range between 11.5 to 13.5 million ounces. Copper equivalent
production will range between 98.6 to 115.1 million pounds. The forecasted range includes increased production and higher recoveries at Yauricocha and Bolivar and increased throughput at Cusi. 

The Company has a significant amount of untapped potential for continued growth in volume, mill throughput and delivering increased ore value to the
mills which will increase cash flow and at current metal prices, should lead the Company to surpass previous EBITDA records in 2017. The Company also expects to see continued growth in mineral resources and metals production and is continuing with a
disciplined and well organized plan to unlock value and growth at all three Mines in 2017. Continued investment in our properties through brownfield exploration and key capital expenditures to improve infrastructure and equipment will lay the ground
work for continued increases in cashflow, metals production, grade and resources for Sierra Metals in 2017 and beyond. 

  
 16 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 The following table sets out Sierra’s Q1 2017 production compared to the fiscal 2017 guidance: 

 

							
	Metal Production	  	Q1 2017    	  	    2017 Guidance   
 
	  	  	Actual    	  	    Low    	  	    High    
	 	  	 	  	 	  	 
	
Silver ounces (000’s)
	  	698  	  	2,987  	  	3,485  
	
Copper pounds (000’s)
	  	7,290  	  	31,050  	  	36,200  
	
Lead pounds (000’s)
	  	9,143  	  	31,100  	  	36,300  
	
Zinc pounds (000’s)
	  	18,137  	  	61,800  	  	72,100  
	
Gold ounces
	  	1,777  	  	7,800  	  	9,100  
	
Silver equivalent ounces (000’s)(1)
	  	3,050  	  	11,534  	  	13,454  
	
Copper equivalent pounds (000’s)(1)(2)
	  	26,086  	  	98,642  	  	115,066  
	 	  	 	  	 	  	 
	
(1) Silver equivalent ounces and copper equivalent pounds were calculated using the following metal
prices:
 $19.50/oz Ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au.

 The Company is on track to meet its 2017 Production Guidance for all metals, except gold. 

Market Review and Trends 
 Metal Prices 

One of the primary drivers of Sierra’s earnings and ability to generate operating cash flows are the market prices of silver, copper, zinc, lead
and gold, which were approximately 16% higher for silver, 24% higher for copper, 30% higher for lead, 65% higher for zinc and 2% higher for gold, during Q1 2017 compared to the average prices for Q1 2016. A shortage of non-ferrous raw materials
combined with an improved view of the Chinese economy have, in recent months, had a positive impact on the prices. 
  

							
	LME Average Prices	 	Three months ended
March 31,	 
	 (In US dollars)
	 	2017	  	 	2016	 
			
	 Silver (oz)
	 	$    17.24	  	$	14.76	 
	 Copper (lb)
	 	$      2.64	  	$	2.12	 
	 Lead (lb)
	 	$      1.02	  	$	0.80	 
	 Zinc (lb)
	 	$      1.26	  	$	0.76	 
	 Gold (oz)
	 	$    1,205	  	$	1,164	 

 Since February 2016, supply concerns, prevailing low to negative interest rates and political uncertainty led to renewed
investment demand in precious metals in comparison to the last nine months of 2015. However, nearing the end of 2016, the U.S. election results revived the sentiment towards the U.S. economy and U.S. dollar, resulting in both silver and gold prices
depreciating against the U.S. currency. During Q1 2017, the prices of silver and gold increased compared to Q1 2016, with the price ranging from $16.00 to $18.47 per ounce for silver and $1,150 to $1,259

  
 17 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
per ounce for gold. Sierra’s average realized silver price for Q1 2017 was $17.71 per ounce compared to $15.26 per ounce in Q1 2016. Sierra’s average realized gold price for Q1 2017 was
$1,231 per ounce compared to $1,212 per ounce in Q1 2016. 
 In early November, copper prices increased over $0.50/lb in two weeks after being on a
downward trend since February 2011 when prices peaked above $4.60/lb. Copper consumption continues to rise at better than projected rates, although still lower than in 2015. Stronger than expected construction and automotive growth have offset
manufacturing declines. The large increases in global mine production growth over the past two years are now mostly complete and mine production growth is expected to fall during 2017. Despite the recent rally in prices and stable metal markets, the
market remains cautious in the short to medium-term. During Q1 2017, copper prices traded in a range of $2.53 to $2.71 per pound with an average quarterly price of $2.64 per pound compared with $2.16 per pound in Q1 2016. Sierra’s average
realized copper price for Q1 2017 was $2.64 per pound compared to $2.13 per pound in Q1 2016. 
 During Q1 2017, zinc prices traded in a range of
$1.17 to $1.33 per pound with an average quarterly price of $1.26 compared with $0.72 per pound in Q1 2016. Sierra’s realized zinc price for Q1 2017 was $1.27 per pound compared to $0.77 per pound in Q1 2016. A continued lack of investment in
new zinc mine production, along with anticipated closures of major zinc mines is likely to result in a continuation of the decline of zinc metal inventories that began in 2013 and resulted in a significant deficit in the global zinc metal market and
limited availability of physical metal within the next two years. LME inventory for zinc decreased during Q1 2017 by 13%. Total global reported exchange stocks are estimated at 15 days of global consumption, down from the 25 year average of 23 days.
Excess zinc metal stocks also continue to be drawn down from non-LME warehouses. 
 Lead prices traded in a range of $0.93 to $1.10 per pound in Q1
2017. Sierra’s realized lead price during Q1 2017 was $1.04 per pound compared to $0.80 per pound in Q1 2016. 
 Currency Exchange Rates 

The results of Sierra’s operations are affected by US dollar exchange rates. Sierra’s largest exposures are to the US dollar/Peruvian Nuevo
Sol exchange rate and the US dollar/Mexican Peso exchange rate which impacts operating and administration costs in Peru and Mexico incurred in Nuevo Soles and Pesos while revenues are earned in US dollars. As at March 31, 2017 the US
dollar/Peruvian Nuevo Sol exchange rate was 3.25 (December 31, 2016: 3.35) and the US dollar/Mexican Peso exchange rate was 18.84 (December 31, 2016: 20.74). A 10% change in the value of the Nuevo Sol and Peso against the US dollar would result in a
change of $4.2 million and $1.4 million in the Company’s net profit, respectively, assuming that our operational performance during 2017 was consistent with 2016. 

The Company also has a minor exposure to the Canadian dollar through corporate administrative costs. 

  
 18 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

	5.	 RESULTS OF OPERATIONS 

Selected Production Results on a Mine-by-Mine Basis for the Past Eight Quarters 
  

																																	
	  	 	2017	 	  	2016	 	  	2015	 
	Production Highlights	 	Q1	 	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 	  	Q4	 	  	Q3	 	  	Q2	 
	 Ore Processed/tonnes
milled
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	251,180	 	  	 	236,650	 	  	 	237,429	 	  	 	215,510	 	  	 	207,580	 	  	 	193,710	 	  	 	193,558	 	  	 	224,988	 
	
Bolivar
	 	 	243,974	 	  	 	245,000	 	  	 	250,261	 	  	 	236,252	 	  	 	218,886	 	  	 	211,311	 	  	 	206,318	 	  	 	209,459	 
	
Cusi
	 	 	34,541	 	  	 	36,055	 	  	 	48,863	 	  	 	52,226	 	  	 	49,753	 	  	 	51,821	 	  	 	52,206	 	  	 	48,928	 
	
Consolidated
	 	 	529,695	 	  	 	517,705	 	  	 	536,553	 	  	 	503,988	 	  	 	476,219	 	  	 	456,842	 	  	 	452,082	 	  	 	483,374	 
	 Silver ounces
produced (000’s)
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	499	 	  	 	550	 	  	 	545	 	  	 	463	 	  	 	283	 	  	 	287	 	  	 	377	 	  	 	577	 
	
Bolivar
	 	 	94	 	  	 	98	 	  	 	95	 	  	 	106	 	  	 	97	 	  	 	103	 	  	 	85	 	  	 	114	 
	
Cusi
	 	 	104	 	  	 	140	 	  	 	172	 	  	 	211	 	  	 	207	 	  	 	213	 	  	 	228	 	  	 	221	 
	
Consolidated
	 	 	697	 	  	 	788	 	  	 	812	 	  	 	780	 	  	 	588	 	  	 	603	 	  	 	691	 	  	 	911	 
	 Copper pounds
produced (000’s)
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	2,783	 	  	 	1,720	 	  	 	1,740	 	  	 	959	 	  	 	1,863	 	  	 	1,047	 	  	 	770	 	  	 	2,037	 
	
Bolivar
	 	 	4,508	 	  	 	4,433	 	  	 	4,417	 	  	 	4,287	 	  	 	3,974	 	  	 	4,447	 	  	 	3,939	 	  	 	4,471	 
	
Cusi
	 	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 
	
Consolidated
	 	 	7,290	 	  	 	6,152	 	  	 	6,156	 	  	 	5,245	 	  	 	5,836	 	  	 	5,493	 	  	 	4,709	 	  	 	6,508	 
	 Lead pounds produced
(000’s)
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	8,382	 	  	 	9,295	 	  	 	10,651	 	  	 	9,550	 	  	 	6,944	 	  	 	6,814	 	  	 	10,127	 	  	 	10,751	 
	
Bolivar
	 	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 
	
Cusi
	 	 	761	 	  	 	695	 	  	 	999	 	  	 	1,105	 	  	 	1,312	 	  	 	1,106	 	  	 	899	 	  	 	365	 
	
Consolidated
	 	 	9,143	 	  	 	9,990	 	  	 	11,650	 	  	 	10,655	 	  	 	8,256	 	  	 	7,920	 	  	 	11,026	 	  	 	11,116	 
	 Zinc pounds produced
(000’s)
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	17,774	 	  	 	16,776	 	  	 	14,041	 	  	 	13,708	 	  	 	10,281	 	  	 	9,265	 	  	 	9,332	 	  	 	13,019	 
	
Bolivar
	 	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 	  	 	-    	 
	
Cusi
	 	 	363	 	  	 	263	 	  	 	394	 	  	 	510	 	  	 	638	 	  	 	-    	 	  	 	-    	 	  	 	-    	 
	
Consolidated
	 	 	18,137	 	  	 	17,039	 	  	 	14,435	 	  	 	14,218	 	  	 	10,919	 	  	 	9,265	 	  	 	9,332	 	  	 	13,019	 
	 Gold ounces
produced
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	779	 	  	 	908	 	  	 	1,457	 	  	 	1,237	 	  	 	1,062	 	  	 	1,041	 	  	 	1,158	 	  	 	1,232	 
	
Bolivar
	 	 	840	 	  	 	801	 	  	 	583	 	  	 	743	 	  	 	859	 	  	 	833	 	  	 	660	 	  	 	804	 
	
Cusi
	 	 	159	 	  	 	158	 	  	 	265	 	  	 	217	 	  	 	314	 	  	 	327	 	  	 	208	 	  	 	141	 
	
Consolidated
	 	 	1,778	 	  	 	1,867	 	  	 	2,305	 	  	 	2,197	 	  	 	2,235	 	  	 	2,201	 	  	 	2,026	 	  	 	2,177	 
		 				  				  				  				  				  				  				  			
		 				  				  				  				  				  				  				  			
	  	 	2017	 	  	2016	 	  	2015	 
	Production Highlights	 	Q1	 	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 	  	Q4	 	  	Q3	 	  	Q2	 
	 Silver equivalent
ounces produced (000’s)1
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	2,202	 	  	 	2,124	 	  	 	2,071	 	  	 	1,816	 	  	 	1,432	 	  	 	1,279	 	  	 	1,493	 	  	 	2,071	 
	
Bolivar
	 	 	680	 	  	 	673	 	  	 	653	 	  	 	660	 	  	 	622	 	  	 	681	 	  	 	592	 	  	 	693	 
	
Cusi
	 	 	168	 	  	 	196	 	  	 	255	 	  	 	302	 	  	 	320	 	  	 	284	 	  	 	282	 	  	 	247	 
	
Consolidated
	 	 	3,050	 	  	 	2,993	 	  	 	2,979	 	  	 	2,778	 	  	 	2,374	 	  	 	2,243	 	  	 	2,366	 	  	 	3,011	 
	 Copper equivalent
pounds produced (000’s)1
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	 	18,829	 	  	 	18,162	 	  	 	17,710	 	  	 	15,535	 	  	 	12,246	 	  	 	10,935	 	  	 	12,766	 	  	 	17,712	 
	
Bolivar
	 	 	5,820	 	  	 	5,755	 	  	 	5,582	 	  	 	5,643	 	  	 	5,323	 	  	 	5,827	 	  	 	5,062	 	  	 	5,929	 
	
Cusi
	 	 	1,437	 	  	 	1,674	 	  	 	2,180	 	  	 	2,579	 	  	 	2,740	 	  	 	2,431	 	  	 	2,413	 	  	 	2,111	 
	
Consolidated
	 	 	26,086	 	  	 	25,591	 	  	 	25,472	 	  	 	23,757	 	  	 	20,309	 	  	 	19,193	 	  	 	20,242	 	  	 	25,752	 
	 Cash cost per tonne
processed
	  
	  				  				  				  				  				  				  			
	
Yauricocha
	 	$	57.81	 	  	$	56.15	 	  	$	56.17	 	  	$	55.41	 	  	$	55.30	 	  	$	57.17	 	  	$	55.24	 	  	$	48.34	 
	
Bolivar
	 	$	19.51	 	  	$	21.88	 	  	$	22.99	 	  	$	26.40	 	  	$	26.55	 	  	$	25.06	 	  	$	32.56	 	  	$	28.14	 
	
Cusi
	 	$	52.71	 	  	$	57.83	 	  	$	47.21	 	  	$	42.57	 	  	$	50.38	 	  	$	48.17	 	  	$	41.20	 	  	$	38.22	 
	
Consolidated
	 	$	39.84	 	  	$	40.06	 	  	$	39.87	 	  	$	40.48	 	  	$	41.57	 	  	$	41.30	 	  	$	43.27	 	  	$	40.01	 

 (1) Silver equivalent ounces and copper equivalent pounds were
calculated using the following metal prices: $19.50/oz Ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au. 
 During the first quarter of
2017, consolidated metal production increased 28% compared to Q1 2016. The increase in metal production was due to higher throughput, higher silver, copper and zinc head grades as well as higher recoveries for all metals, except gold, at Yauricocha.
Additionally, the Company saw higher throughput and recoveries of all metals at Bolivar but this was partially offset by lower throughput, head grades and recoveries of all metals at Cusi. 

  
 19 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Bolivar had another quarter of consistent plant throughput in Q1 2017 with 243,974 tonnes processed
which was an 11% increase when compared to Q1 2016. The higher throughput and recoveries of all metals helped offset the lower head grades encountered and resulted in a 9% increase in copper equivalent production compared to Q1 2016. Plant
improvements completed at Bolivar during the second half of 2016, including the installation of a new vibrating screen and cyclones which contributed to the improvement in recoveries of all metals during Q1 2017. 

During Q1 2017, consolidated silver and copper equivalent production increased 28% compared to Q1 2016, despite just an 11% increase in throughput and
was the fourth best quarter of silver and copper equivalent production in the Company’s history. 
 The Company continues to see significant
improvements in the operations at Yauricocha, as we have completed the restructuring process at the mine. Silver equivalent production increased by 54%, despite just a 21% increase in throughput, in Q1 2017 versus Q1 2016 as the Company continued to
focus on the production of higher grade material to maximizing metal content and profitability. 
  

													
	Consolidated Production	  	Three Months Ended	 
	  	  	March 31, 2017	 	  	March 31, 2016	 	  	% Var	 
	 Tonnes
processed
	  	 	529,695	 	  	 	476,220	 	  	 	11	% 
	 Daily
throughput
	  	 	6,054	 	  	 	5,443	 	  	 	11	% 
	 	  				  	 	 	 	  	 	 	 
	 Silver ounces
(000’s)
	  	 	698	 	  	 	588	 	  	 	19	% 
	 Copper pounds
(000’s)
	  	 	7,290	 	  	 	5,836	 	  	 	25	% 
	 Lead pounds
(000’s)
	  	 	9,143	 	  	 	8,255	 	  	 	11	% 
	 Zinc pounds
(000’s)
	  	 	18,137	 	  	 	10,919	 	  	 	66	% 
	 Gold
ounces
	  	 	1,777	 	  	 	2,236	 	  	 	-21	% 
	 Silver
equivalent ounces (000’s) (1)
	  	 	3,050	 	  	 	2,375	 	  	 	28	% 
	 Copper
equivalent pounds (000’s) (1)
	  	 	26,086	 	  	 	20,309	 	  	 	28	% 
	 Metals payable
in concentrates
	  	 	 	 	  	 	 	 	  	 	 	 
	 Silver ounces
(000’s)
	  	 	638	 	  	 	370	 	  	 	72	% 
	 Copper pounds
(000’s)
	  	 	12,453	 	  	 	4,586	 	  	 	172	% 
	 Lead pounds
(000’s)
	  	 	8,336	 	  	 	6,358	 	  	 	31	% 
	 Zinc pounds
(000’s)
	  	 	14,996	 	  	 	8,779	 	  	 	71	% 
	 Gold
ounces
	  	 	1,030	 	  	 	1,519	 	  	 	-32	% 
	 Silver
equivalent ounces (000’s) (1)
	  	 	2,716	 	  	 	1,763	 	  	 	54	% 
	 Copper
equivalent pounds (000’s) (1)
	  	 	23,233	 	  	 	15,076	 	  	 	54	% 

 (1) Silver equivalent ounces and copper equivalent pounds were calculated using the following metal prices: $19.50/oz
Ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au. 

  
 20 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 The Peruvian Operation 

Yauricocha Mine, Yauyos, Peru 
 Corona’s main asset,
Yauricocha, is an underground mine located in western central Peru in the Yauyos province, approximately 12 km west of the Continental Divide. The Yauricocha property covers 18,778 hectares that straddle a 20 km strike length of the prolific
Yauricocha fault, a major ore controlling structure in this part of western central Peru. The mine is at an average altitude of 4,600 meters and has been producing for more than 68 years. Ore is processed at the on-site Chumpe plant using a
combination of crushing, grinding and flotation and is soon to be permitted to produce at a rate of 3,000 tpd. The ore is treated in two separate circuits and is extracted from three different types of deposits which include the following: 

 

	 	-	 A polymetallic deposit, containing silver, lead, zinc, copper, and gold 

	 	-	 A lead oxide deposit, containing lead, silver and gold 

	 	-	 A copper oxide deposit, containing copper, silver, lead and gold 

Discovery of New Esperanza North Zone and Drill Results at the Cuye-Mascota Zone 

On May 1, 2017 the Company announced the discovery of a new high-grade lead and silver oxides zone, referred to as the Esperanza North zone, which
is located between the Esperanza zone and Cachi-Cachi Mine. The Company also announced drilling results which demonstrate the extension of the high-grade sulfide zone, referred to as the Cuye-Mascota zone which was discovered in November 2016.
Results included 69 meters of continuous sulfide mineralization. This zone is located 200 meters north of the central mine area, along strike from current mining activities. The new discovery and extension come as part of an ongoing brownfield
drilling program that is testing priority targets at the Yauricocha Mine located 150 kilometers east southeast of Lima in the Yauricocha Mining District (Cordillera Occidental), Peru. All drilling that has taken place will be included in an upcoming
Mineral Resource and Reserve Estimate report that is expected to be published for the Yauricocha Mine in the fourth quarter of 2017.Drilling for the new Esperanza North zone took place from the Yauricocha tunnel which is located on the 720 level as
the company drilled between limestone (Jumasha) and Granodioritic intrusive with an objective of identifying the contact face. 
 The Cuye orebody had
been previously mined down from surface to the 870m level horizon of the Yauricocha mine and it used to be one of the main cashflow generators 10 years ago at Yauricocha. The orebody historically was predominantly a copper sulfide deposit which
shrank to only many small structures below the 870 level. Exploration carried out during 2011 and 2012 was unsuccessful between the 870m and 1020m level horizon, which was the lowest level Company geologists could drill at that time. The results of
the current drilling program on the 1070 level confirm according to the mine geologists that the Cuye orebody continues at depth to below the 1270 level. Geologists have also identified the transition zone of oxides to fresh lead, zinc and silver
sulfide mineralization in this drilling program which also has an important economic relevance to its high grades, particularly for copper. 
 The
diamond drill intercepts at the Cuye Ore Body some of the widest intercepts of sulfide mineralization in the Company ́s recent history. This ore body is of the replacement type, it is embedded in the contact between the Jumasha limestone and
the intrusive (monzonitic composition). Within the intrusive, endoskarn horizons are present due to the metasomatic activity 

  
 21 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
in the contact with the limestone host. In the contact area of the mineralized zones with the intrusive host geologists noted high concentrations of argilites. The minerals present are friable
pyrite, chalcopyrite and hydrothermal calcosine in the center of the ore body, with sphalerite and galena in lower proportions, forming a halo around the limestone contact. Diamond drill core logs have shown evidence of intrusions of dioritic
composition, apparently younger than the monzonitic intrusions, which are responsible for the mineralized fluids and ore body formation in the Cuye Area. It is very important to continue exploring the Cuye Area during the rest of the year. 

Yauricocha Production 
 A summary of contained metal
production from the Yauricocha Mine for the three months ended March 31, 2017 has been provided below: 
  

																
	Yauricocha Production	  	3 Months Ended
	  	  	Q1 2017	  	Q1 2016	  	% Var.
				
	 Tonnes processed (mt)
	  	 	 	251,180    	 	  	 	 	207,580    	 	  	 	 	21%    	 
	 Daily throughput

 
	  	 	 	2,871    	 	  	 	 	2,372    	 	  	 	 	21%    	 
				
	 Silver grade (g/t)
	  	 	 	81.37    	 	  	 	 	74.21    	 	  	 	 	10%    	 
	 Copper grade
	  	 	 	0.81%    	 	  	 	 	0.75%    	 	  	 	 	8%    	 
	 Lead grade
	  	 	 	1.76%    	 	  	 	 	2.29%    	 	  	 	 	-23%    	 
	 Zinc grade
	  	 	 	3.60%    	 	  	 	 	2.68%    	 	  	 	 	35%    	 
	 Gold Grade (g/t)
	  	 	 	0.56    	 	  	 	 	0.63    	 	  	 	 	-11%    	 
				
	 Silver recovery
	  	 	 	75.95%    	 	  	 	 	57.19%    	 	  	 	 	33%    	 
	 Copper recovery
	  	 	 	62.00%    	 	  	 	 	54.23%    	 	  	 	 	14%    	 
	 Lead recovery
	  	 	 	85.96%    	 	  	 	 	66.17%    	 	  	 	 	30%    	 
	 Zinc recovery
	  	 	 	89.12%    	 	  	 	 	83.98%    	 	  	 	 	6%    	 
	 Gold Recovery

 
	  	 	 	17.25%    	 	  	 	 	25.33%    	 	  	 	 	-32%    	 
				
	 Silver ounces (000’s)
	  	 	 	499    	 	  	 	 	283    	 	  	 	 	76%    	 
	 Copper pounds (000’s)
	  	 	 	2,783    	 	  	 	 	1,863    	 	  	 	 	49%    	 
	 Lead pounds (000’s)
	  	 	 	8,382    	 	  	 	 	6,944    	 	  	 	 	21%    	 
	 Zinc pounds (000’s)
	  	 	 	17,774    	 	  	 	 	10,281    	 	  	 	 	73%    	 
	 Gold ounces

 
	  	 	 	779    	 	  	 	 	1,062    	 	  	 	 	-27%    	 
				
	 Silver equivalent ounces (000’s)
(1)
	  	 	 	2,202    	 	  	 	 	1,432    	 	  	 	 	54%    	 
	 Copper equivalent pounds (000’s)(1)
  
	  	 	 	18,829    	 	  	 	 	12,246    	 	  	 	 	54%    	 

 (1) Silver equivalent ounces & copper equivalent pounds were calculated using the following metal 

prices: $19.50/oz Ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au. 

The Yauricocha Mine processed a quarterly record of 251,180 tonnes in Q1 2017 representing a 21% increase compared to Q1 2016. The 54% increase in metal
production in Q1 2017 was driven by higher plant throughput, higher silver, copper and zinc head grades, and higher recoveries of all metals, except gold. The Company continues to see improvements in metal production as a result of the installation
of a higher capacity hoist and the positive impact of the operational improvement program implemented at the mine during the past year. 

  
 22 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Continued production from higher grade ore zones, including the Esperanza Zone and the Cuerpos Chicos,
has allowed the Company to continue to increase throughput and improve head grades, resulting in higher silver and copper equivalent metal production. The Company also saw an increase in the production of all metals, except gold, with increases in
production of silver (76%), copper (49%), zinc (73%), and lead (21%). Management believes throughput and metal production will remain stable throughout the year. 

The Mexican Operations 
 Bolivar Mine, Chihuahua State 

The Bolivar Mine is a contiguous portion of the 15,217 hectare Bolívar Property land package within the municipality of Urique, in the Piedras
Verdes mining district of Chihuahua State, Mexico. During 2012, the Company achieved its first full year of commercial production at the new Piedras Verdes plant, which is located 6 kilometres from the Bolivar Mine that had an initial capacity of
1,000 tpd. In September 2013, the Piedras Verdes plant further increased its daily throughput capacity to 2,000 tpd by installing a new circuit. The Company is currently producing at a rate of approximately 2,700 tpd and expects to increase this
throughput rate to 3,000 tpd and higher during 2017 and beyond. 
 At Bolívar during Q1 2017, 3,189 m were drilled in the following areas: 

1,051m in the El Gallo area with the objective of finding the continuation of the El Gallo Inferior orebody between the Mina de Fierro and the Bolivar
Mine. A skarn zone was intersected with an average ore body width of 9 meters, with chalcopyrite and semi-massive magnetite. 
 2,138m were drilled at
Bolivar Northwest, which intersected two mineralized zones; the first zone corresponds to the El Gallo Superior, which included a lithology of marmatite skarn with desiminated chalcopyrite, which include an average width of 8m for the orebody. The
second zone corresponds to the El Gallo Inferior orebody, a magnetite skarn zone with semi-massive chalcopyrite, with an average width of 10m. 
 A
Titan 24 geophysical survey was performed during Q1 2017 in the area of Bolívar NW and Bolivar West, covering 2.4 km long by 2.4 KM wide, on 200m spaced lines. The final results of this survey are expected to be received by the end of May
2017. 
 Bolivar Mineral Resource Estimate 
 Mineral
Resource Estimations have been conducted by Matthew Hastings of SRK Consulting (U.S.) Inc., a Qualified Person under National Instrument 43-101 – Standards of Disclosure for Mineral Projects, using Maptek VulcanTM and Leapfrog GeoTM
software. 
 Mineral Reserve Estimations have been conducted by Jon Larson of SRK Consulting (U.S.) Inc., a Qualified Person under National Instrument
43-101 – Standards of Disclosure for Mineral Projects, using Maptek VulcanTM and Minemax iGantt software. 
 The September 30, 2016,
consolidated mineral resource statement for the Bolivar Mine area is presented in Table 1. These resources have been stated in unmined areas of the deposits as well as within surveyed pillar shapes in the existing mined out areas, using a lower
cut-off grade 

  
 23 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
(“COG”) to reflect the fact that they have been exposed through previous mining. SRK has prepared an NI 43-101 Technical Report which supports this disclosure. 

 

	Table 1:	Consolidated Bolivar Mineral Resource Estimate as of September 30, 2016 – SRK Consulting (U.S.), Inc. 

  

																																							
	Resources - Indicated	    	  	 	    	  	 	    	  	 	    	  	 	    	  	 	    	Contained Metal	 
	  	  	 	    	Tonnes
(000’s)	 	    	Ag
g/t	 	    	Cu
%	 	    	Au
g/t	 	    	CuEq
%	 	    	Ag
M oz	 	    	Cu
M lb	 	    	Au
K oz	 	    	CuEq
M lb	 
	 Bolivar
	  	 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 
	 	  	 Indicated
	    	 	9,335	 	    	 	18.1	 	    	 	0.90	 	    	 	0.30	 	    	 	1.23	 	    	 	5.4	 	    	 	184.9	 	    	 	91.0	 	    	 	252.9	 
		  		    				    				    				    				    				    				    				    				    			
	Resources - Inferred	    	  	 	    	  	 	    	  	 	    	  	 	    	  	 	    	Contained Metal	 
	  	  	 	    	Tonnes
(000’s)	 	    	Ag
g/t	 	    	Cu
%	 	    	Au
g/t	 	    	CuEq
%	 	    	Ag
M oz	 	    	Cu
M lb	 	    	Au
K oz	 	    	CuEq
M lb	 
	 Bolivar
	  	 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 
	 	  	 Inferred
	    	 	9,055	 	    	 	17.9	 	    	 	0.86	 	    	 	0.33	 	    	 	1.20	 	    	 	5.2	 	    	 	171.6	 	    	 	97.0	 	    	 	239.8	 

 (1) Mineral resources are reported inclusive of ore reserves. Mineral resources are not ore reserves and do not have
demonstrated economic viability. All figures rounded to reflect the relative accuracy of the estimates. Copper, gold, and silver assays were capped where appropriate. 

(2) Mineral resources are reported at variable metal value cut-off grades based on metal price assumptions*, metallurgical recovery assumptions**,
mining/transport costs (US$13.59/t), processing costs (US$10.00/t), and general and administrative costs (US$3.40/t). 
 (3) The metal value cut-off
grade for the unmined portions of the Bolivar Mine is US$27 and is US$20 for the remaining vertical pillars in the mined areas. The mineral resources within the remaining vertical pillars comprise less than 1% of the Mineral Resource 

* Metal price assumptions considered for the calculation of metal value are: Copper (Cu): US$/lb 2.43, Silver (Ag): US$/oz 18.30, and Gold (Au): US$/oz
1,283.00. 
 ** Metallurgical recovery assumptions are 81% Cu, 77% Ag, and 49% Au. 

The consolidated mineral reserve statement for the Bolivar Mine area is presented in Table 2. The effective date for the reserves estimated herein is
September 30, 2016. SRK has prepared an NI 43-101 Technical Report which supports this disclosure. 
  

	Table 2:	Consolidated Bolivar Mineral Reserve Estimate as of September 30, 2016 – SRK Consulting (U.S.), Inc. 

  

																																							
	Reserves - Probable	    	  	 	    	  	 	    	  	 	    	  	 	    	  	 	    	Contained Metal	 
	  	  	 	    	Tonnes
(000’s)	 	    	Ag
g/t	 	    	Cu
%	 	    	Au
g/t	 	    	CuEq
%	 	    	Ag
M oz	 	    	Cu
M lb	 	    	Au
K oz	 	    	CuEq
M lb	 
	 Bolivar
	  	 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 
	 	  	 Probable
	    	 	4,327	 	    	 	17.5	 	    	 	0.85	 	    	 	0.31	 	    	 	1.18	 	    	 	2.4	 	    	 	80.7	 	    	 	44.0	 	    	 	112.1	 

  

	•	 	 All figures rounded to reflect the relative accuracy of the estimates. Totals may not sum due to rounding.

	•	 	 Ore reserves are reported at NSR cutoffs (CoG) based on metal price assumptions*, metallurgical recovery assumptions**,
mining costs, processing costs, general and administrative (G&A) costs, and treatment and refining charges. 

 * Metal price
assumptions considered for the calculation of NSR are: Copper (Cu): US$/lb 2.43, Silver (Ag): US$/oz 18.30, and Gold (Au): US$/oz 1,283.00. 
 **
Metallurgical recovery assumptions are 81% Cu, 77% Ag, and 49% Au. 

	•	 	 The NSR CoG is variable by mining method: 

	 	o	 US$30.50 = Room and Pillar; and 

	 	o	 US$32.50 = Longhole Stoping. 

	•	 	 Ore reserves have been stated on the basis of a mine design, mine plan, and cash-flow model: 

	 	o	 Mining recovery applied is 85%. 

	 	o	 Mining dilution (internal and external), applied with a zero grade, ranges from 12% to 36% and averaged 16%.

 La Sidra 
 On March 6, 2017 the
Company announced the results of the initial drill program on the Bolivar property in Chihuahua State, Mexico and continues to define high grade silver-gold and 

  
 24 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
polymetallic mineralization within the La Sidra vein. The mineralized zone currently extends to over 500 meters in length and to 300 meters in depth and is still open along strike and down dip.

 Drilling programs also continue at Bolivar West with future plans to drill Bolivar North West (skarn ore deposit area) to define high grade copper
with coincident strong chargeability and within resistivity zones detected during a recently completed a 400 hectare Titan 24 Induced Polarization (‘IP’) survey conducted by Quantec Geosciences of Toronto, Ontario. 

A planned 20,000-metre drilling program has been budgeted with 9,500 meters of In-fill drilling planned at La Sidra and 11,500 meters at Bolivar West
and Bolivar NorthWest. Currently drilling is being conducted on Bolivar West zone. The purpose of these programs is to define existing known areas. Once final results are available from the geophysical program, further drilling programs will be
carried out. 
 Bolivar Production 
 A summary of contained
metal production from the Bolivar Mine for the three months ended March 31, 2017 has been provided below: 
  

																
	Bolivar Production	  	3 Months Ended
	  	  	Q1 2017	  	Q1 2016	  	% Var.
				
	 Tonnes processed (mt)
	  	 	 	243,974    	 	  	 	 	218,886    	 	  	 	 	11%    	 
	 Daily throughput

 
	  	 	 	2,788    	 	  	 	 	2,502    	 	  	 	 	11%    	 
				
	 Copper grade
	  	 	 	1.03%    	 	  	 	 	1.06%    	 	  	 	 	-3%    	 
	 Silver grade (g/t)
	  	 	 	15.25    	 	  	 	 	18.37    	 	  	 	 	-17%    	 
	 Gold grade (g/t)
	  	 	 	0.20    	 	  	 	 	0.27    	 	  	 	 	-23%    	 
				
	 Copper recovery
	  	 	 	81.49%    	 	  	 	 	77.69%    	 	  	 	 	5%    	 
	 Silver recovery
	  	 	 	78.95%    	 	  	 	 	75.40%    	 	  	 	 	5%    	 
	 Gold recovery

 
	  	 	 	52.49%    	 	  	 	 	45.99%    	 	  	 	 	14%    	 
				
	 Copper pounds (000’s)
	  	 	 	4,508    	 	  	 	 	3,973    	 	  	 	 	13%    	 
	 Silver ounces (000’s)
	  	 	 	94    	 	  	 	 	97    	 	  	 	 	-3%    	 
	 Gold ounces

 
	  	 	 	840    	 	  	 	 	859    	 	  	 	 	-2%    	 
				
	 Silver equivalent ounces
(000’s)(1)
	  	 	 	680    	 	  	 	 	622    	 	  	 	 	9%    	 
	 Copper equivalent pounds (000’s)(1)
  
	  	 	 	5,820    	 	  	 	 	5,323    	 	  	 	 	9%    	 

 (1) Silver equivalent ounces & copper equivalent pounds were calculated using the following metal 

prices: $19.50/oz Ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au. 

Bolivar had another quarter of consistent plant throughput in Q1 2017 with 243,974 tonnes processed which was an 11% increase when compared to Q1 2016.
The higher throughput and recoveries of all metals helped offset the lower head grades encountered and resulted in a 9% increase in copper equivalent production compared to Q1 2016. Plant improvements completed at Bolivar during the second half of
2016, including the installation of a new vibrating screen and cyclones. 

  
 25 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Copper production of 4.5 million pounds increased 13%, silver production of 94,000 ounces
decreased 3% and gold production of 840 ounces decreased 2% in Q1 2017 compared to Q1 2016. 
 The Company’s focus at Bolivar during the
remainder of 2017 will be on improving production volume through the procurement of new equipment including Jumbos, Scoops and Trucks expected to arrive in stages with full delivery complete by the end of the second quarter with the intention of
moving more material from available production stopes within the mine. 
 The Cusi Mine, Chihuahua 

The Company’s Cusi Mine encompasses 73 concessions covering 11,977 hectares that include 12 historical mines, each located on a mineralized
structure, which lie within 40 kilometers of the Malpaso Plant located in Chihuahua State, Mexico. On January 1, 2013 the Company announced that the Cusi Mine achieved commercial production. The Company has been successful in increasing the
throughput at Cusi from 170 tpd during 2013 to 534 tpd during 2016. 
 Mine development of the mineralized structures at the Promontorio and Santa
Eduwiges Mines in Q1 2017 totaled 2,145 meters (392 meters of ramps, 1,113 meters of drifts, 112 meters of raises, and 528 meters of other development). As a result of this development, 34,541 tons of ore was stoped with average head grades of: 0.25
g/t. Au; 146 g/t Ag; 1.25% Pb and 1.26% Zn. The veins mined in Q1 2017 in the Santa Eduwiges Mine were: Moctezuma (level 14), San Nicolás (level 14), and San Antonio (level 14). 

At the Promontorio Mine, ore was extracted from the following veins: Promontorio, and San Nicolas (level 2). 

During Q1 2016, 2,242 meters of infill drilling was carried out inside the mine to verify the continuity of structures and assist in the development of
mining stopes of various veins. During Q1 2017 the Company drilled 1,076 meters from surface to explore the San Ignacio, and San Rafael veins. 
 Cusi Mineral
Resource Estimate 
 Mineral Resource Estimations have been conducted by Matthew Hastings of SRK Consulting (U.S.) Inc., a Qualified Person
under National Instrument 43-101 – Standards of Disclosure for Mineral Projects, using Maptek VulcanTM and Leapfrog GeoTM software. 

The updated Mineral Resource Estimate disclosed herein is the result of drilling programs completed between January 2014 and January 2017. This review
does not include any data from the 15,000-metre drilling program that was focused on the high-grade Santa Rosa de Lima zone. Drilling in this area is based on a new conceptual interpretation of the Santa Rosa de Lima structure at the Cusi Mine. This
interpretation is based on exploration drilling of the NW-SE regional structural system and demonstrates that mineralization is consistent across the assessed area. Management are encouraged that through exploration programs such as this one it will
demonstrate that there is a strong potential for further structural extensions of high-grade zones at the Company’s Cusi Mine. 
 Currently management are
executing a high priority definition drilling program to convert the 

  
 26 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
current drilled resource into a measured and indicated category. Once drilling results are available an update addendum will be completed on this area. Management anticipates the completion of
this work will occur in the second half of the year. 
 A Technical Report prepared by SRK Consulting (U.S.) Inc. in accordance with NI 43-101
standards of disclosure has been completed and filed on SEDAR. 
 The January 31, 2017, consolidated mineral resource statement for the Cusi Mine area is
presented in Table 1. 
 Table 1: Consolidated Cusi Mineral Resource Estimate as of January 31, 2017 – SRK Consulting (U.S.), Inc. 

 

																																															
	Resources - Indicated	 	    	Contained Metal	 
	  	 	 	    	 Tonnes

(000’s)
	 	    	 Ag

g/t
	 	    	 Pb

%
	 	    	 Zn

%
	 	    	 Au

g/t
	 	    	 AgEq

g/t
	 	    	 Ag

M oz
	 	    	Pb
M lb	 	    	 Zn

M lb
	 	    	 Au

K oz
	 	    	 AgEq

M oz
	 
	 Cusi
	 	 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 
	 	 	 Indicated
	    	 	1,990	 	    	 	237.1	 	    	 	0.53	 	    	 	0.53	 	    	 	0.16	 	    	 	283.0	 	    	 	15.2	 	    	 	23.3	 	    	 	23.3	 	    	 	10.1	 	    	 	18.1	 
		 		    				    				    				    				    				    				    				    				    				    				    			
	Resources - Inferred	 	    	Contained Metal	 
	  	 	 	    	 Tonnes

(000’s)
	 	    	 Ag

g/t
	 	    	Pb
%	 	    	Zn
%	 	    	Au
g/t	 	    	AgEq
g/t	 	    	Ag
M oz	 	    	Pb
M lb	 	    	Zn
M lb	 	    	Au
K oz	 	    	AgEq
M oz	 
	 Cusi
	 	 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 	    			 
	 	 	 Inferred
	    	 	1,200	 	    	 	305.3	 	    	 	0.51	 	    	 	0.64	 	    	 	0.14	 	    	 	354.0	 	    	 	11.8	 	    	 	13.5	 	    	 	17.1	 	    	 	5.6	 	    	 	13.7	 

 (1) Mineral resources are reported inclusive of ore reserves. Mineral resources are not ore reserves and do not have
demonstrated economic viability. All figures rounded to reflect the relative accuracy of the estimates. Gold, silver, lead and zinc assays were capped where appropriate. 

(2) Mineral resources are reported at a single cut-off grade of 110 g/t Ag based on metal price assumptions*, metallurgical recovery assumptions, mining
costs (US$26.74/t), processing costs (US$16.63/t), and general and administrative costs (US$3.40/t). 
 * Metal price assumptions considered for the
calculation of the cut-off grade and equivalency are: Silver (Ag): US$/oz 18.30, Lead (US$/LB 0.93), Zinc (US$/lb 1.15) and Gold (US$/oz 1,283.00. 

The resources were estimated by SRK. Matthew Hastings, M.Sc., PGeo, MAusIMM #314693 of SRK, a Qualified Person, performed the resource calculations for
the Cusi Mine. 
 ** Metallurgical recovery assumptions are 74% Ag, 52% Au, 81% Pb, 59% Zn. 

Discovery of Significant High-Grade Zone at Cusi Silver Mine in Mexico 

On February 27, 2017 the Company announced the discovery of new high grade silver intercepts occurring in the Santa Rosa de Lima complex located
within the current Cusi Mine operational area. The Santa Rosa de Lima complex lies within a regional structure extending some 64 kilometers. Extension on the Cusi property has an anticipated length of 12 kilometers. The discovery comes as part of a
reinterpretation of the Hydrothermal model and a drilling campaign consisting of 15,000 meters which began in December 2016 and has now been completed. The structural mineralization widths from this program range from 1.5 meters to 10.0 meters with
an average width of 4.16 meters. Full results from the program are expected to be released in late June 2017. Subsequent to the completion of the initial drilling campaign, the Company has also commenced an additional drilling campaign consisting of
15,000 meters of infill drilling which is approximately 25% complete. 

  
 27 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 The mineralization at the Santa Rosa de Lima structure is located 100 meters below the surface, and can
occasionally be observed at surface at the intersections of veins like “Promontorio” and “Santa Edwiges”. 
 San Nicolas Vein 

This is a structural vein on surface known longitudinally for approximately 1,300 metres with a general direction of Northwest 50 degrees Southeast. In
the area of the Promontorio Mine the structure is identified on several levels and is believed to be an oxidized structure potentially containing economic material. In the area of the Santa Edwiges Mine the structure is also identified on several
levels with less oxidation and greater amounts of sulphides. Drilling is ongoing and drift development on this target has resulted in deliverable base metal contributions in zinc and lead sulphide mineralization to the Malpaso mill plant. 

Cusi Production 
 A summary of contained metal production
from the Cusi Mine for the three months ended March 31, 2017 has been provided below: 
  

													
	Cusi Production	  	3 Months Ended	 
	  	  	Q1 2017	 	  	Q1 2016	 	  	% Var.	 
				
	 Tonnes processed (mt)
	  	 	34,541    	 	  	 	49,753    	 	  	 	-31%    	 
	 Daily throughput

 
	  	 	395    	 	  	 	569    	 	  	 	-31%    	 
				
	 Silver grade (g/t)
	  	 	146.13    	 	  	 	174.38    	 	  	 	-16%    	 
	 Gold grade (g/t)
	  	 	0.25    	 	  	 	0.29    	 	  	 	-16%    	 
	 Lead grade
	  	 	1.25%    	 	  	 	1.41%    	 	  	 	-12%    	 
	 Zinc grade
	  	 	1.26%    	 	  	 	1.38%    	 	  	 	-9%    	 
				
	 Silver recovery
	  	 	64.18%    	 	  	 	74.16%    	 	  	 	-13%    	 
	 Gold recovery
	  	 	57.87%    	 	  	 	66.84%    	 	  	 	-13%    	 
	 Lead recovery
	  	 	80.22%    	 	  	 	84.92%    	 	  	 	-6%    	 
	 Zinc recovery

 
	  	 	37.91%    	 	  	 	42.02%    	 	  	 	-10%    	 
				
	 Silver ounces (000’s)
	  	 	104    	 	  	 	207    	 	  	 	-50%    	 
	 Gold ounces
	  	 	159    	 	  	 	314    	 	  	 	-49%    	 
	 Lead pounds (000’s)
	  	 	761    	 	  	 	1,312    	 	  	 	-42%    	 
	 Zinc pounds (000’s)

 
	  	 	363    	 	  	 	638    	 	  	 	-43%    	 
				
	 Silver equivalent ounces
(000’s)(1)
	  	 	168    	 	  	 	320    	 	  	 	-48%    	 
	 Copper equivalent pounds (000’s)(1)
  
	  	 	1,437    	 	  	 	2,740    	 	  	 	-48%    	 

 (1) Silver equivalent ounces & copper equivalent pounds were calculated using the following metal prices:
$19.50/oz Ag, $2.28/lb Cu, $0.85/lb Pb, $1.05/lb Zn, $1,369/oz Au. 
 Total ore processed of 34,541 tonnes during Q1 2017 decreased 31% compared to Q1
2016. Lower head grades and recoveries for all metals contributed to the 48% decrease in silver equivalent production. 

  
 28 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Silver production of 104,000 ounces decreased 50%, gold production of 159 ounces decreased 49%, lead
production of 0.8 million pounds decreased 42%, and zinc production of 0.4 million pounds decreased 43% compared to Q1 2016. 
 Despite the
decreases in tonnage and metal production at Cusi it is very important to note that the Company is currently re-evaluating its development plan at the mine following a successful reinterpretation of the mine’s geology. Management are very
encouraged by data from a recently completed 15,000-metre drilling program that was focused on the high-grade Santa Rosa de Lima zone with a goal of increasing tonnage and grade at Cusi, which was not included in the recently released Mineral
Resource Estimate at Cusi (please see news release dated April 13, 2017). Drilling in this area is based on a new conceptual interpretation of the Santa Rosa de Lima structure at the Cusi Mine. This interpretation is based on exploration
drilling of the NW-SE regional structural system and demonstrates that mineralization is consistent across the assessed area. 
 Management plans to
focus on improving head grades and maintaining production at a rate of approximately 400tpd, while stockpiling ore at the plant and producing it in batches. The Company will be drifting on the Santa Rosa de Lima zone in an effort to improve head
grades as well as focus on the reinterpretation of geology at Cusi. 

  
 29 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Consolidated Mineral Resources 
  

																																																															
	 Reserves - Proven and Probable	 	 	 	 	 	 	 	 	Contained Metal	 	 	 	 	 	 	 
	 	 	 	 	Tonnes	 	 	Ag	 	 	Cu	 	 	Pb	 	 	Zn	 	 	Au	 	 	AgEq	 	 	CuEq	 	 	Ag	 	 	Cu	 	 	Pb	 	 	Zn	 	 	Au	 	 	AgEq	 	 	CuEq	 
	 	 	 	 	(x1000)	 	 	(g/t)	 	 	(%)	 	 	(%)	 	 	(%)	 	 	(g/t)	 	 	(g/t)	 	 	(%)	 	 	(M oz)	 	 	(M lb)	 	 	(M lb)	 	 	(M lb)	 	 	(K oz)	 	 	(M oz)	 	 	(M lb)	 
	  Yauricocha
	 	Proven	 	 	847	 	 	 	71	 	 	 	0.59	 	 	 	1.60	 	 	 	2.82	 	 	 	0.65	 	 	 	336	 	 	 	-	 	 	 	1.9	 	 	 	10.9	 	 	 	29.8	 	 	 	52.6	 	 	 	17,735	 	 	 	9.2	 	 	 	-	 
		 		 	 	 	 	 	 	 	 		 	 	 	 	 
		 	 Probable
	 	 	2,940	 	 	 	58	 	 	 	0.91	 	 	 	1.02	 	 	 	2.95	 	 	 	0.62	 	 	 	329.00	 	 	 	-	 	 	 	5.5	 	 	 	58.8	 	 	 	66.1	 	 	 	191.4	 	 	 	58,205	 	 	 	31.1	 	 	 	-	 
		 		 	 	 	 	 	 	 	 		 	 	 	 	
		 	
Proven & Probable
	 	 	3,787	 	 	 	61	 	 	 	0.84	 	 	 	1.15	 	 	 	2.92	 	 	 	0.62	 	 	 	331	 	 	 	-	 	 	 	7.4	 	 	 	69.7	 	 	 	95.9	 	 	 	244.0	 	 	 	75,940	 	 	 	40.3	 	 	 	-	 
	  Bolivar
	 	 Probable
	 	 	4,327	 	 	 	18	 	 	 	0.85	 	 	 	-	 	 	 	-	 	 	 	0.31	 	 	 	-	 	 	 	1.18	 	 	 	2.4	 	 	 	80.7	 	 	 	-	 	 	 	-	 	 	 	44,000	 	 	 	-	 	 	 	112.1	 
	  Total
	 	 Proven & Probable
	 	 	8,114	 	 	 	38	 	 	 	0.85	 	 	 	1.15	 	 	 	2.92	 	 	 	0.45	 	 	 	331	 	 	 	1.2	 	 	 	9.8	 	 	 	150.4	 	 	 	95.9	 	 	 	244.0	 	 	 	119,940	 	 	 	40.3	 	 	 	112.1	 
		 		 				 				 				 				 				 				 				 				 				 				 				 				 				 				 			
	 Resources - Measured and Indicated	 	 	 	 	 	 	 	 	Contained Metal	 	 	 	 	 	 	 
	 	 	 	 	Tonnes	 	 	Ag	 	 	Cu	 	 	Pb	 	 	Zn	 	 	Au	 	 	AgEq	 	 	CuEq	 	 	Ag	 	 	Cu	 	 	Pb	 	 	Zn	 	 	Au	 	 	AgEq	 	 	CuEq	 
	 	 	 	 	(x1000)	 	 	(g/t)	 	 	(%)	 	 	(%)	 	 	(%)	 	 	(g/t)	 	 	(g/t)	 	 	(%)	 	 	(M oz)	 	 	(M lb)	 	 	(M lb)	 	 	(M lb)	 	 	(oz)	 	 	(M oz)	 	 	(M lb)	 
	  Yauricocha
	 	Measured	 	 	1,429	 	 	 	75	 	 	 	0.87	 	 	 	1.54	 	 	 	3.10	 	 	 	0.71	 	 	 	371	 	 	 	-	 	 	 	3.4	 	 	 	27.4	 	 	 	48.6	 	 	 	97.7	 	 	 	32,703	 	 	 	17.0	 	 	 	-	 
		 		 	 	 	 	 	 		 	 	 	 	 	 	 
		 	Indicated	 	 	6,442	 	 	 	58	 	 	 	1.17	 	 	 	0.81	 	 	 	2.61	 	 	 	0.66	 	 	 	332.00	 	 	 	-	 	 	 	12.0	 	 	 	166.8	 	 	 	115.1	 	 	 	370.7	 	 	 	137,189	 	 	 	68.7	 	 	 	-	 
		 		 	 		 	 	 		 	 	 	 	 	 	 
		 	Measured & Indicated	 	 	7,871	 	 	 	61	 	 	 	1.12	 	 	 	0.94	 	 	 	2.70	 	 	 	0.67	 	 	 	339	 	 	 	-	 	 	 	15.4	 	 	 	194.2	 	 	 	163.7	 	 	 	468.4	 	 	 	169,892	 	 	 	85.7	 	 	 	-	 
	  Bolivar
	 	Indicated	 	 	9,335	 	 	 	18	 	 	 	0.90	 	 	 	-	 	 	 	-	 	 	 	0.30	 	 	 	 	 	 	 	1.23	 	 	 	5.4	 	 	 	184.9	 	 	 	-	 	 	 	-	 	 	 	91,000	 	 	 	-	 	 	 	252.9	 
	  Cusi
	 	Indicated	 	 	1,990	 	 	 	237	 	 	 	-	 	 	 	0.53	 	 	 	0.53	 	 	 	0.16	 	 	 	283	 	 	 	-	 	 	 	15.2	 	 	 	-	 	 	 	23.3	 	 	 	23.3	 	 	 	10,100	 	 	 	18.1	 	 	 	-	 
	  Total
	 	 Measured & Indicated 
	 	 	19,196	 	 	 	58	 	 	 	1.0	 	 	 	0.9	 	 	 	2.3	 	 	 	0.4	 	 	 	328	 	 				 	 	36.0	 	 	 	379.1	 	 	 	187.0	 	 	 	491.7	 	 	 	270,992	 	 	 	103.8	 	 	 	252.9	 
		 	 	 				 				 				 				 				 				 				 				 				 				 				 				 				 				 			
	 Resources - Inferred	 	 	 	 	 	 	 	 	Contained Metal	 	 	 	 	 	 	 
	 	 	 	 	Tonnes	 	 	Ag	 	 	Cu	 	 	Pb	 	 	Zn	 	 	Au	 	 	AgEq	 	 	CuEq	 	 	Ag	 	 	Cu	 	 	Pb	 	 	Zn	 	 	Au	 	 	AgEq	 	 	CuEq	 
	 	 	 	 	(x1000)	 	 	(g/t)	 	 	(%)	 	 	(%)	 	 	(%)	 	 	(g/t)	 	 	(g/t)	 	 	(%)	 	 	(M oz)	 	 	(M lb)	 	 	(M lb)	 	 	(M lb)	 	 	(oz)	 	 	(M oz)	 	 	(M lb)	 
	  Yauricocha
	 	Inferred	 	 	3,745	 	 	 	49	 	 	 	1.33	 	 	 	0.58	 	 	 	1.86	 	 	 	0.53	 	 	 	292	 	 	 	-	 	 	 	5.9	 	 	 	110.2	 	 	 	48.0	 	 	 	153.7	 	 	 	64,299	 	 	 	35.1	 	 	 	-	 
		 		 	 	 	 	 	 		 	 	 	 	 	 	 
	  Bolivar
	 	Inferred	 	 	9,055	 	 	 	18	 	 	 	0.86	 	 	 	-	 	 	 	-	 	 	 	0.33	 	 	 	-	 	 	 	1.20	 	 	 	5.2	 	 	 	171.6	 	 	 	-	 	 	 	-	 	 	 	97,000	 	 	 	-	 	 	 	239.8	 
		 		 	 	 	 	 	 		 	 	 	 	 	 	 
	  Cusi
	 	Inferred	 	 	1,200	 	 	 	305	 	 	 	-	 	 	 	0.51	 	 	 	0.64	 	 	 	0.14	 	 	 	354	 	 	 	-	 	 	 	11.8	 	 	 	-	 	 	 	13.5	 	 	 	17.1	 	 	 	5,600	 	 	 	13.7	 	 	 	-	 
	  Total
	 	 Inferred
	 	 	14,000	 	 	 	51	 	 	 	1.00	 	 	 	0.56	 	 	 	1.56	 	 	 	0.37	 	 	 	307	 	 	 	1.20	 	 	 	22.9	 	 	 	281.8	 	 	 	61.5	 	 	 	170.8	 	 	 	166,899	 	 	 	48.8	 	 	 	239.8	 

 Notes: 

	 	1.	 The effective date of the mineral reserve and resource statement for the Yauricocha Mine including Mina Central,
Cachi-Cachi, Mascota and Cuerpos mineral reserve and resource estimate is Dec 31, 2015. The effective date for Esperanza is June 30, 2016. Details of the estimate are provided in the Company’s August 11, 2016 press release .A NI
43-101 compliant technical report to support the estimate has been filed on SEDAR as of September 12, 2016. Measured and Indicated Resources include Proven and Probable Reserves. Silver equivalent is based on the following metal prices:
US$16.76/oz Ag, US$2.28/lb Cu, US$0.86/lb Pb and US$0.94 Zn and US$1,251/oz Au. 

	 	2.	 The effective date of the Bolivar mineral reserve and resource estimate is Sep 31, 2016. Details of the estimate are
provided in the Company’s Apr 11, 2017 press releases and a NI 43-101 compliant technical report filed on SEDAR on Apr 19, 2017. Measured, Indicated and Inferred Resources include Proven and Probable Reserves. Copper equivalent is based on the
following metal prices: US$18.30/oz Ag, US2.43/lb Cu and US$1,283 Au. Totals for proven and probable are diluted for internal waste. 

	 	3.	 The effective date of the Cusi mineral resource estimate is Jan 31, 2017. Details of the estimate are provided in the
Company’s Apr 13, 2017 press release and a NI 43-101 compliant technical report has been filed on SEDAR as of April 17, 2017. 

	 	4.	 Mineral resources that are not mineral reserves do not have demonstrated economic viability. 

  
 30 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 6. SUMMARIZED FINANCIAL RESULTS 

Three months ended March 31, 2017 (compared to the three months ended March 31, 2016) 

Net income (loss) attributable to shareholders for Q1 2017 was $2.6 million (Q1 2016: $(5.1) million) or $0.02 per share (basic and diluted) (Q1 2016:
$(0.03)). The major differences between these periods are explained below. 
 Revenues 

Revenue from metals payable at the Yauricocha Mine in Peru of $38.5 million for Q1 2017 compared to $12.5 million in Q1 2016. The increase in revenues
was due to a 21% increase in tonnes processed, higher head grades for silver, copper and zinc, higher recoveries for all metals, except gold, and the increase in the prices of silver (16%), copper (24%), lead (30%), zinc (65%), and gold (2%). The
Company achieved record production during Q1 2017 as the operational improvement program and the focus on extracting higher value ore, in addition to ore sourced from the Esperanza Zone, has positively impacted the revenues during the last three
quarters. 
 Revenue from metals payable in Mexico were $16.0 million for Q1 2017 compared to $11.2 million for the same period in 2016. Revenue in
Mexico increased as a result of the increase in copper (24%) and silver (16%) prices during Q1 2017 compared to Q1 2016; and the 11% increase in throughput, and higher recoveries of all metals at Bolivar. Also, there has been a decrease in
head grades and recoveries of all metals, except gold recoveries, at the Bolivar Mine, and lower throughput and silver head grades and recoveries at Cusi. This was partially offset by a 31% decrease in throughput, and lower head grades and
recoveries for all metals at Cusi. 
 Revenue from metals payable at the Bolivar Mine were $13.8 million for Q1 2017 compared to $8.3 million for the
same period in 2016. The increase in revenue from the Bolivar Mine was due to the 24% increase in the price of copper realized in Q1 2017 compared to Q1 2016, as well as the 11% increase in throughput and increase in recoveries of all metals, which
helped offset the decline in head grades of all metals. 
 Revenue from metals payable at the Cusi Mine for Q1 2017 were $2.2 million compared to $2.9
million for the same period in 2016. The decrease in revenues was due to the 31% decrease in throughput, and lower head grades and recoveries for all metals realized during Q1 2017. Despite the decrease in tonnage and metal production at Cusi, it is
important to note that the Company is currently re-evaluating its development plan at the mine following a successful reinterpretation of the mine’s geology. Management are very encouraged by data from a recently completed 15,000-metre drilling
program that was focused on the high-grade Santa Rosa de Lima zone with a goal of increasing tonnage and grade at Cusi. 

  
 31 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 The following table shows the Company’s realized selling prices for Q1 2017 and each quarter in 2016: 

 

																					
	Realized Metal Prices	 	2017	 	  	2016	 
	(In US dollars)	 	Q1	 	  	Q4	 	  	Q3	 	  	Q2	 	  	Q1	 
		 				 
	 Silver (oz)
	 	$	    17.71	 	  	$	    16.82	 	  	$	    19.17	 	  	$	    17.08	 	  	$	    15.26	 
	 Copper (lb)
	 	$	2.64	 	  	$	2.38	 	  	$	2.16	 	  	$	2.15	 	  	$	2.13	 
	 Lead (lb)
	 	$	1.04	 	  	$	0.95	 	  	$	0.85	 	  	$	0.79	 	  	$	0.80	 
	 Zinc (lb)
	 	$	1.27	 	  	$	1.16	 	  	$	1.02	 	  	$	0.86	 	  	$	0.77	 
	 Gold (oz)
	 	$	1,231	 	  	$	1,210	 	  	$	1,347	 	  	$	1,246	 	  	$	1,212	 

 Yauricocha’s cost of sales per silver equivalent payable ounce was $8.26 (Q1 2016 - $8.81), cash cost per silver
equivalent payable ounce was $7.39 (Q1 2016 - $8.69), and all-in sustaining cash cost (“AISC”) per silver equivalent payable ounce was $10.60 (Q1 2016 - $15.16) for Q1 2017 compared to the same period in 2016. The decrease in the AISC per
silver equivalent payable ounce during Q1 2017 was due to an increase in silver equivalent payable ounces as a result of higher throughput and ore feed head grades from the increase in available production from higher grade zones in the Mine. Also,
lower treatment and refining costs were incurred during Q1 2017 resulting from improved terms within re-negotiated sales contracts with our off-takers. 

Bolivar’s cost of sales per copper equivalent payable pound was $1.16 (Q1 2016 - $1.28), cash cost per copper equivalent payable pound was $1.14
(Q1 2016 - $1.41), and AISC per copper equivalent payable pound was $1.89 (Q1 2016 - $2.35) for Q1 2017 compared to the same period in 2016. The decrease in the AISC per copper equivalent payable pound during Q1 2017 was due to an increase in copper
equivalent payable pounds as a result of 11% higher throughput, and higher recoveries realized for all metals, offset an increase of $0.3M in sustaining capital expenditures related to mine development and equipment purchases. 

Cusi’s cost of sales per silver equivalent payable ounce was $8.53 (Q1 2016 - $6.15), cash cost per silver equivalent payable ounce was $10.82 (Q1
2016 - $3.88), and AISC per silver equivalent payable ounce was $22.72 (Q1 2016 - $12.88) for Q1 2017 compared to the same period in 2016. AISC per silver equivalent payable ounce increased due to the increase of $0.4M in sustaining capital
expenditures related to stope and drift development within the mine during Q1 2017 as the Company is currently re-evaluating its development plan following a successful reinterpretation of the mine’s geology. The decline in throughput and
silver head grades and recoveries resulted in fewer silver equivalent payable ounces which also contributed to the higher AISC per silver equivalent payable ounce in Q1 2017 compared to Q1 2016. 

Non-cash depletion, depreciation and amortization 
 The
Company recorded total non-cash depletion, depreciation and amortization expense for Q1 2017 of $16.7 million compared to $10.6 million for the same period in 2016. 

A large component of the net income (loss) for every period is the non-cash depletion charge in Peru, which was $9.2 million for Q1 2017 (Q1 2016: $4.8
million). The non-cash depletion charge is based on the aggregate fair value of the Yauricocha mineral property at the date of acquisition 

  
 32 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
of Corona of $371.0 million amortized over the total proven and probable reserves of the mine. The increase in the non-cash depletion charge in Q1 2017 was due to the reduction in proven and
probable reserves reported in the Company’s NI 43-101 Technical Report issued on August 11, 2016. Also, the increase in tonnes mined during Q1 2017 compared to Q1 2016 resulted in a higher depletion charge. 

General and Administrative Expenses 
 The Company incurred
general and administrative expenses of $3.6 million for Q1 2017 compared to $3.0 million for the same period in 2016. The increase in general and administrative costs in Q1 2017 compared to the same period in 2016 was due to an increase in legal
fees incurred in Canada with regards to the work being performed towards listing Sierra Metals Inc on the NYSE MKT stock exchange, as well as the proposed spin-out of the Northern Peruvian Properties within the Company’s Plexmar Resources
subsidiary. 
 Adjusted EBITDA (1) 

The Company recorded adjusted EBITDA of $25.4 million during Q1 2017 (Q1 2016: $4.4 million) which was comprised of $20.4 million (Q1 2016: $0.8
million) from the Peruvian operations and $5.5 million (Q1 2016: $4.2 million) from the operations in Mexico. The increase in adjusted EBITDA is due to the increase in revenues discussed previously. Adjusted EBITDA is a non-IFRS measure that
represents an indication of the Company’s continuing capacity to generate earnings from operations before taking into account management’s financing decisions and costs of consuming capital assets, which vary according to their vintage,
technological currency, and management’s estimate of their useful life. Adjusted EBITDA comprises revenue less operating expenses before interest expense (income), property, plant and equipment amortization and depletion, and income taxes. The
Company considers cash flow before movements in working capital to be the IFRS performance measure that is most closely comparable to adjusted EBITDA. 
 Income
taxes 
 The Company recorded current tax expense of $6.2 million for Q1 2017 compared to $0.2 million for the same period in 2016. The increase
was the result of the higher taxable income generated in Peru during Q1 2017 compared to Q1 2016. 
 During Q1 2017, the Company recorded a deferred
tax recovery of $4.5 million compared to $1.7 million in the same period in 2016. The main driver for the Company’s consolidated deferred tax recovery is the non-cash recovery associated with the acquisition of Corona which has increased year
over year in line with the non-cash depletion charge mentioned previously. 
 Adjusted net income attributable to shareholders (1) 
 The Company recorded an adjusted net income of $11.0 million for Q1 2017 compared to an
adjusted net loss of $(2.0) million for the same period in 2016. The increase resulted from the increase in revenues at the Yauricocha and Bolivar Mines. Adjusted net income is defined by management as the net income attributable to shareholders
shown in the condensed interim consolidated statements of income excluding the non-cash depletion charge due to the acquisition of Corona, the corresponding deferred income tax recovery, and certain non-recurring or
non-

  
 33 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
cash items. Accordingly, management considers this metric to be more meaningful to measure the Company’s profitability than net income as it adjusts for specific non-cash items. 

Other Comprehensive Income (Loss) 
 Other comprehensive
income (“OCI”) for Q1 2017 was $3.1 million compared to other comprehensive loss (“OCL”) of $(5.3) million for the same period in 2016. OCI includes a foreign currency loss of $(0.5) million for Q1 2017 (Q1 2016: $0.7 million
gain). The unrealized foreign currency translation loss was caused by the weakening of the Canadian dollar relative to the US dollar during the period which resulted in a foreign exchange loss on the translation of the Canadian dollar net assets
into the Company’s US dollar presentation currency. 
  

	(1) 	 This is a non-IFRS performance measure, see non-IFRS Performance Measures section of this MD&A.

 The following tables display selected annual financial results detailed by operating segment: 

 

																					
	 	  	Peru	 	 	Mexico	 	 	Mexico	 	 	Canada	 	 	 	 
	 	  	Yauricocha Mine	 	 	Bolivar Mine	 	 	Cusi Mine	 	 	Corporate	 	 	Total	 
	Three months ended March 31, 2017	  	$	 	 	$	 	 	  	 	 	$	 	 	$	 
						
	 Revenue
	  	 	38,501	 	 	 	13,811	 	 	 	2,206	 	 	 	-  	 	 	 	54,518	 
						
	 Production cost of sales
	  	 	(15,128	) 	 	 	(7,000	) 	 	 	(1,536	) 	 	 	-  	 	 	 	(23,664	) 
	 Depletion of mineral property
	  	 	(9,631	) 	 	 	(1,002	) 	 	 	(220	) 	 	 	-  	 	 	 	(10,853	) 
	 Depreciation and amortization of property, plant and
equipment
	  	 	(2,993	) 	 	 	(2,202	) 	 	 	(483	) 	 	 	-  	 	 	 	(5,678	) 
	 Cost of sales

 
	  	 	(27,752	) 	 	 	(10,204	) 	 	 	(2,239	) 	 	 	-  	 	 	 	(40,195	) 
	 Gross profit (loss) from mining operations
	  	 	10,749	 	 	 	3,607	 	 	 	(33	) 	 	 	-  	 	 	 	14,323	 
	     
	  	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 Net income (loss) from operations
	  	 	5,202	 	 	 	(52	) 	 	 	(976	) 	 	 	(560	) 	 	 	3,614	 
	     
	  				 				 				 				 			
	 Adjusted EBITDA
	  	 	20,400	 	 	 	5,163	 	 	 	345	 	 	 	(547	) 	 	 	25,361	 
						
	 	  	Peru	 	 	Mexico	 	 	Mexico	 	 	Canada	 	 	 	 
	 	  	Yauricocha Mine	 	 	Bolivar Mine	 	 	Cusi Mine	 	 	Corporate	 	 	Total	 
	Three months ended March 31, 2016	  	$	 	 	$	 	 	  	 	 	$	 	 	$	 
						
	 Revenue
	  	 	12,500	 	 	 	8,300	 	 	 	2,940	 	 	 	-  	 	 	 	23,740	 
						
	 Production cost of sales
	  	 	(9,276	) 	 	 	(5,573	) 	 	 	(1,223	) 	 	 	-  	 	 	 	(16,072	) 
	 Depletion of mineral property
	  	 	(5,285	) 	 	 	(933	) 	 	 	(205	) 	 	 	-  	 	 	 	(6,423	) 
	 Depreciation and amortization of property, plant and
equipment
	  	 	(1,066	) 	 	 	(1,416	) 	 	 	(311	) 	 	 	-  	 	 	 	(2,793	) 
	 Cost of sales

 
	  	 	(15,627	) 	 	 	(7,922	) 	 	 	(1,739	) 	 	 	-  	 	 	 	(25,288	) 
	 Gross profit (loss) from mining operations
	  	 	(3,127	) 	 	 	378	 	 	 	1,201	 	 	 	-  	 	 	 	(1,548	) 
	     
	  	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	 Net income (loss) from operations
	  	 	(5,228	) 	 	 	686	 	 	 	(47	) 	 	 	(1,371	) 	 	 	(5,960	) 
	     
	  				 				 				 				 			
	 Adjusted EBITDA
	  	 	780	 	 	 	2,266	 	 	 	1,931	 	 	 	(604	) 	 	 	4,373	 

  
 34 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Cash Flows 

Cash flow from operating activities before movements in working capital of $22.8 million for Q1 2017 increased from $5.0 million in the same period of
2016. The increase was due to the increase in revenues and operating margins previously discussed. 
 Net cash flow of $(9.8) million (Q1 2016: $(4.0)
million) used in investing activities for Q1 2017 consists of purchases of property, plant and equipment, capital expenditures related to the Yauricocha shaft and tunnel development, and exploration and evaluation assets in Peru and Mexico. 

A breakdown of the Company’s capital expenditures of $9.8 million during Q1 2017 is presented below: 

 

																	
	Q1 2017 Capital Expenditures by Mine	 
	($ Millions)	 	    Yauricocha    	 	 	    Bolivar    	 	 	    Cusi    	 	 	    Total    	 
	Expenditure	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	
Esperanza development and infill drilling
	 	$	0.40	 	 	$	-  	 	 	$	-  	 	 	$	0.40	 
	
Mine Development
	 	$	1.10	 	 	$	0.45	 	 	$	1.10	 	 	$	2.65	 
	
Shafts
	 	$	0.50	 	 	$	-  	 	 	$	-  	 	 	$	0.50	 
	
Tunnel
	 	$	0.40	 	 	$	-  	 	 	$	-  	 	 	$	0.40	 
	
Equipment
	 	$	0.90	 	 	$	1.50	 	 	$	0.10	 	 	$	2.50	 
	
Tailings Dam
	 	$	0.10	 	 	$	0.10	 	 	$	-  	 	 	$	0.20	 
	
Increase Mill Capacity/maintenance
	 	$	0.30	 	 	$	0.30	 	 	$	0.30	 	 	$	0.90	 
	
Mine Exploration
	 	$	0.50	 	 	$	0.40	 	 	$	1.30	 	 	$	2.20	 
	 	 	$	4.20	 	 	$	2.75	 	 	$	2.80	 	 	$	9.75	 

 Net cash flow of $(5.7) million (Q1 2016: $5.8 million) from (used in) financing activities for Q1 2017 consists of
$(5.2) million (Q1 2016: $(12.9) million) in repayments of loans and credit facilities, $(3.7) million (2015: $(1.9) million) in interest paid on loans and credit facilities, and $(0.5) million (Q1 2015: $Nil) of dividends paid to non-controlling
interest shareholders. This was partially offset by proceeds received from the issuance of credit facilities of $4.0 million in Q1 2016. 
 7. QUARTERLY
 FINANCIAL REVIEW 
 The following table displays selected results from the eight most recent quarters: 

 

																																	
	(In thousands of United States dollars, except per share amounts)	  	2017	 	  	2016	 	 	2015	 
	  	Mar-31	 	  	Dec-31	 	 	Sep-30	 	  	Jun-30	 	 	Mar-31	 	 	Dec-31	 	 	Sep-30	 	 	Jun-30	 
	 Revenues
	  	 	54,518	 	  	 	41,825	 	 	 	40,757	 	  	 	36,858	 	 	 	23,740	 	 	 	25,024	 	 	 	28,421	 	 	 	45,867	 
	 Adjusted EBITDA
	  	 	25,361	 	  	 	15,985	 	 	 	16,264	 	  	 	5,265	 	 	 	4,373	 	 	 	(1,935	) 	 	 	2,013	 	 	 	18,249	 
	 Adjusted net income (loss) attributable to
shareholders
	  	 	10,990	 	  	 	3,516	 	 	 	5,003	 	  	 	454	 	 	 	(1,967	) 	 	 	(3,599	) 	 	 	(3,646	) 	 	 	7,274	 
	 Net income (loss) attributable to
shareholders
	  	 	2,558	 	  	 	(5,076	) 	 	 	1,367	 	  	 	(3,440	) 	 	 	(5,116	) 	 	 	(27,083	) 	 	 	(6,761	) 	 	 	1,209	 
	 								
	 Basic and diluted
earnings (loss) per share ($)
	  	 	0.02	 	  	 	(0.04	) 	 	 	0.01	 	  	 	(0.02	) 	 	 	(0.03	) 	 	 	(0.17	) 	 	 	(0.04	) 	 	 	0.00	 

  
 35 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 8.     LIQUIDITY AND CAPITAL RESOURCES 

Financial Condition Review 
 The following table provides a
comparison of key elements of Sierra’s balance sheet as at March 31, 2017 and December 31, 2016: 
  

									
	(000’s)	  	March 31, 2017	 	  	December 31, 2016	 
	 Cash and cash
equivalents
	  	$	37,959	 	  	$	42,145	 
	 Working
capital
	  	$	12,442	 	  	$	9,576	 
	 Total
assets
	  	$	361,790	 	  	$	364,812	 
	 	  				  	 	 	 
	 Debt (net of
financing fees)
	  	$	75,040	 	  	$	78,760	 
	 Total
liabilities
	  	$	172,699	 	  	$	178,850	 
	 	  				  			 
	
Equity attributable to owners of the Company
	  	$	                    
162,807	 	  	$	                    160,268	 

 Cash and cash equivalents of $38.0 million and working capital of $12.4 million as at March 31, 2017 compared to
$42.1 million and $9.6 million, respectively, at the end of 2016. Cash and cash equivalents have decreased by $4.2 million during Q1 2017 due to $11.0 million of operating cash flows being offset by capital expenditures incurred in Mexico and Peru
of $(9.8) million, repayment of loans, credit facilities and interest of $(5.2) million, and dividends paid to non-controlling interest shareholders of $(0.5) million. Included in the $11.0 million of operating cash flows were negative changes in
non-cash working capital items of $7.7 million due to the increase accounts receivable as at March 31, 2017. 
 Trade and other receivables
includes $4.4 million (December 31, 2016 - $3.8 million) of Mexican value-added tax (“VAT”) receivables. During 2014, the Company commenced the process to request the refund of the VAT receivable relating to 2012 and 2013 and has
successfully received refunds of $11.5 million for some of the monthly claims submitted over the past three years. The Company expects to collect or offset the VAT balance against 2017 VAT payables. Amounts included in trade and other receivables
are current and the Company has no allowance for doubtful accounts as at March 31, 2017. 
 Sierra’s outstanding loan and credit facilities are shown below:

  

													
	  	  	Balance Outstanding	 
	(000’s)	  	Limit	 	  	March 31, 2017	 	  	December 31, 2016	 
	 Dia Bras Peru loan
with BCP (Corona Acquisition)(1)
	  	$	-    	 	  	$	44,381	 	  	$	45,820	 
	 Corona loan
with BCP (Corona Operating)(2)
	  	$	                15,000	 	  	$	                11,029	 	  	$	                12,449	 
	 Corona Notes
payable to Scotiabank Peru(3)
	  	$	15,000	 	  	$	14,750	 	  	$	14,750	 
	 Pre-export finance
facility with Metagri S.A. de C.V.(4)
	  	$	4,000	 	  	$	366	 	  	$	1,179	 
	 FIFOMI working
capital facility
	  	$	7,543	 	  	$	4,514	 	  	$	4,484	 
	 Total Debt
	  	 	 	 	  	$	75,040	 	  	$	78,682	 
	 	  	 	 	 	  			 	  	 	 	 
	 Less cash
balances
	  	 	 	 	  	$	37,959	 	  	$	42,145	 
	 Net Debt
	  	 	 	 	  	$	37,081	 	  	$	36,537	 

 (1 – 4) See condensed interim consolidated financial statements
as at March 31, 2017 for details of each loan and credit facility. 

  
 36 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Refinancing of Credit Facility 

The remaining $48 million due on the Corona Acquisition Facility (“the Facility”) with Banco de Credito del Peru was refinanced in
August 7, 2015. 
 The most significant amendments to the Facility were as follows: 

The remaining $48 million on the Facility was split into two tranches: 

	 	•	 	 Tranche 1, in the amount of $24 million has quarterly principal repayments of $1.5 million beginning in November 2016
and ending in August 2020; 

	 	•	 	 Tranche 2, in the amount of $24 million, has no quarterly principal repayments and to be repaid in full in August 2020;

	 	•	 	 One year principal repayment grace period; 

	 	•	 	 Reduced interest rate equal to 3.65% plus 3M LIBOR vs previous rate of 4.15% plus 3M LIBOR; and 

	 	•	 	 Term of the Facility extended for five years. 

This was a very successful refinancing for the Company, where interest costs were reduced, and almost $20 million of debt principal repayments were no
longer due for the remainder of 2015 and 2016. Additionally, quarterly principal repayments thereafter have been reduced from $3.4 million to $1.5 million. The new Facility provides the Company with increased financial flexibility during these
difficult times of continued declining metal prices and allows for the completion of the Company’s capital expenditure programs which will benefit the Company with potential production increases and reduced risk exposure. The Company is in
compliance with all financial covenants as at March 31, 2017. 
 Outstanding shares 

The authorized share capital at March 31, 2017 was an unlimited number of common shares without par value. As at May 11, 2017, the
Company had 162.7 million shares issued and outstanding (December 31, 2016 – 162.4 million shares issued and outstanding). 
 As at March 31,
2017, there were 2,291,993 RSUs outstanding at a weighted average fair value of C$2.39. 
 As at May 11, 2017 there are 2,291,993 RSU’s outstanding at a
weighted average fair value of C$2.39. 
 On September 27, 2016, a Special Meeting of Shareholders was held, whereby 98% of Sierra Metals’
shareholders voted in favour to amend the Company’s articles to consolidate the issued and outstanding Common Shares of the Corporation on the basis of one post-consolidation Common Share for every two pre-consolidation Common Shares or such
other consolidation ratio that the directors of the Corporation deem desirable. Such ratio is to be no greater than one post-consolidation Common Share for every five pre-consolidation Common Shares. 

  
 37 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 9.     SAFETY, HEALTH AND ENVIRONMENT 

Sierra Metals is fully committed to disciplined and responsible growth and has Safety and Health and Environmental Policies in place to support this
commitment. The Company’s corporate responsibility objectives are to prevent pollution, minimize the impact operations may cause to the environment and practice progressive rehabilitation of areas impacted by its activities. The Company aims to
operate in a socially responsible and sustainable manner, and to follow international guidelines in Mexico and Peru. The Company focuses on social programs with the local communities in Mexico and Peru on an ongoing basis. 

10.     OTHER RISKS AND UNCERTAINTIES 

Claims and Legal Proceedings 
 The Company is subject to
various claims and legal proceedings covering a wide range of matters that arise in the normal course of business. Each of these matters is subject to various uncertainties and it is possible that some of these matters may be resolved unfavorably to
the Company. The Company carries liability insurance coverage and will establish accruals and provisions for matters that are probable and can be reasonably estimated. In addition, the Company may be involved in disputes with other parties in the
future which may result in a significant impact on our financial condition, cash flow and results of operations. 
 The claims associated with the Company’s
Mexican operations are discussed in detail below: 
  

	 	a)	 In October 2009, Polo y Ron Minerals, S.A. de C.V. (“P&R”) sued the Company and one of its subsidiaries,
Dia Bras Mexicana S.A. de C.V. (“DBM”). P&R claimed damages for the cancelation of an option agreement (the “Option Agreement”) regarding the San Jose properties in Chihuahua, Mexico (the “San Jose Properties”). The
San Jose Properties are not located in any areas where DBM currently operates, nor are these properties included in any resource estimates of the Company. The Company believes that it has complied with all of its obligations pertaining to the Option
Agreement. In October 2011, the 8th Civil Court of the Judicial District of Morelos in Chihuahua issued a resolution that absolved the Company from the claims brought against it by P&R on the basis that P&R did not provide evidence to
support any of its claims. P&R appealed this resolution to the State Court, which overruled the previous resolution and ordered the Company to: (i) transfer to P&R 17 mining concessions from the Company’s Bolivar project, including
the mining concessions where both mine operations and mineral reserves are located; and (ii) pay $423 to P&R; the Company was not appropriately notified of this resolution. In February 2013, a Federal Court in the State of Chihuahua granted
the Company a temporary suspension of the adverse resolution issued by the State Court of Chihuahua, Mexico. In July 2014, a Federal Court in the State of Chihuahua ordered that the Company was entitled to receive proper notice of the adverse
resolution previously issued by the State Court of Chihuahua. This allows the Company to proceed with its appeal (writ of “amparo”) of the State Court’s previous resolution. The adverse resolution has been temporarily suspended since
March 2013, which suspension will remain in place pending the writ of amparo. The amparo is being heard in Federal Court and will challenge the State Court’s ruling. The Federal Court’s verdict in the amparo will be final and
non-appealable. The Company continues to vigorously defend its position by applying the 

  
 38 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 proper legal resources necessary to defend its position. On February 12,
2016, The Second Federal Collegiate Court of Civil and Labor Matters, of the Seventeenth circuit in the State of Chihuahua, (“the Federal Court”) issued a new judgment ruling that the State Court lacked jurisdiction to rule on issues
concerning mining titles, and that no previous rulings by the State Court against the Company shall stand. They ordered the cancellation of the previous adverse resolution by the state Court. The Company will continue to vigorously defend this
claim. Sierra Metals continues to believe that the original claim is without merit.
  

	 	b)	 In 2009, a personal action was filed in Mexico against DBM by an individual, Ambrosio Bencomo Muñoz as
administrator of the intestate succession of Ambrosio Bencomo Casavantes y Jesus Jose Bencomo Muñoz, claiming the annulment and revocation of the purchase agreement of two mining concessions, Bolívar III and IV between Minera Senda de
Plata S.A. de C.V. and Ambrosio Bencomo Casavantes, and with this, the nullity of purchase agreement between DBM and Minera Senda de Plata S.A. de C.V. In June 2011, the Sixth Civil Court of Chihuahua, Mexico, ruled that the claim was unfounded and
dismissed the case, the plaintiff appealed to the State Court. 

  

	11.	 NON-IFRS PERFORMANCE MEASURES 

The non-IFRS performance measures presented do not have any standardized meaning prescribed by IFRS and are therefore unlikely to be directly comparable
to similar measures presented by other issuers. 
 Non-IFRS reconciliation of adjusted EBITDA 

EBITDA is a non-IFRS measure that represents an indication of the Company’s continuing capacity to generate earnings from operations before taking
into account management’s financing decisions and costs of consuming capital assets, which vary according to their vintage, technological currency, and management’s estimate of their useful life. EBITDA comprises revenue less operating
expenses before interest expense (income), property, plant and equipment amortization and depletion, and income taxes. Adjusted EBITDA has been included in this document. Under IFRS, entities must reflect in compensation expense the cost of
share-based payments. In the Company’s circumstances, share-based payments involve a significant accrual of amounts that will not be settled in cash but are settled by the issuance of shares in exchange for cash. As such, the Company has made
an entity specific adjustment to EBITDA for these expenses. The Company has also made an entity-specific adjustment to the foreign currency exchange (gain)/loss. The Company considers cash flow before movements in working capital to be the IFRS
performance measure that is most closely comparable to adjusted EBITDA. 

  
 39 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 The following table provides a reconciliation of adjusted EBITDA to the condensed interim consolidated
financial statements for the three months ended March 31, 2017 and 2016: 
  

									
	 	 	Three Months Ended	 
	(In thousands of United States dollars)	 	March 31, 2017	 	 	March 31, 2016	 
			
	 Net income (loss)
	 	$	3,614	 	 	$	(5,960	) 
			
	 Adjusted for:
	 				 			
	 Depletion and depreciation
	 	 	16,674	 	 	 	    10,557	 
	 Interest expense and other finance costs
	 	 	1,046	 	 	 	1,325	 
	 Interest income
	 	 	(44	) 	 	 	(8	) 
	 Share-based payments
	 	 	450	 	 	 	120	 
	 Foreign currency exchange gain
	 	 	1,916	 	 	 	(233	) 
	 Income taxes
	 	 	1,705	 	 	 	(1,428	) 
	 Adjusted EBITDA
	 	$	              25,361	 	 	$	              4,373	 

 Non-IFRS reconciliation of adjusted net income (loss) 

The Company has included the non-IFRS financial performance measure of adjusted net income (loss), defined by management as the net income (loss)
attributable to shareholders shown in the statement of earnings plus the non-cash depletion charge due to the acquisition of Corona and the corresponding deferred tax recovery and certain non-recurring or non-cash items such as share-based
compensation and foreign currency exchange (gains) losses. The Company believes that, in addition to conventional measures prepared in accordance with IFRS, certain investors may want to use this information to evaluate the Company’s
performance and ability to generate cash flows. Accordingly, it is intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance in accordance with IFRS. 

The following table provides a reconciliation of adjusted net income (loss) to the condensed interim consolidated financial statements for the three
months ended March 31, 2017 and 2016: 
  

									
	 	 	Three Months Ended	 
	(In thousands of United States dollars)	 	March 31, 2017	 	 	March 31, 2016	 
			
	 Net income (loss) attributable to shareholders
	 	$	2,558	 	 	$	              (5,116)	 
	 Non-cash depletion charge on Corona’s acquisition
	 	 	9,167	 	 	 	4,790	 
	 Deferred tax recovery on Corona’s acquisition depletion charge
	 	 	(3,101	) 	 	 	(1,528	) 
	 Share-based compensation
	 	 	450	 	 	 	120	 
	 Foreign currency exchange gain
	 	 	1,916	 	 	 	(233	) 
	 Adjusted net income (loss) attributable to
shareholders
	 	$	              10,990	 	 	$	(1,967	) 

 Cash cost per silver equivalent payable ounce and copper equivalent payable pound 

The Company uses the non-IFRS measure of cash cost per silver equivalent ounce and copper equivalent payable pound to manage and evaluate operating
performance. The Company believes that, in addition to conventional measures prepared in accordance with IFRS, certain investors use this information to evaluate the Company’s performance and ability to generate

  
 40 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
cash flows. Accordingly, it is intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with
IFRS. The Company considers cost of sales per silver equivalent payable ounce and copper equivalent payable pound to be the most comparable IFRS measure to cash cost per silver equivalent payable ounce and copper equivalent payable pound and has
included calculations of this metric in the reconciliations within the applicable tables to follow. This is the first time the Company is including the cost of sales per equivalent ounce and pound metrics. 

All-in sustaining cost per silver equivalent payable ounce and copper equivalent payable pound 

All-In Sustaining Cost (“AISC”) is a non-IFRS measure and was calculated based on guidance provided by the World Gold Council
(“WGC”) in June 2013. WGC is not a regulatory industry organization and does not have the authority to develop accounting standards for disclosure requirements. Other mining companies may calculate AISC differently as a result of
differences in underlying accounting principles and policies applied, as well as differences in definitions of sustaining versus development capital expenditures. 

Effective Q4 2015, the Company changed its methodology for calculating the cash cost and all-in sustaining cost metrics from a silver payable ounce and
copper payable pound, net of by-product credits basis, to a silver equivalent payable ounce and copper equivalent payable pound basis, including treatment and refining charges of all metals in the calculation. 

AISC is a more comprehensive measure than cash cost per ounce/pound for the Company’s consolidated operating performance by providing greater
visibility, comparability and representation of the total costs associated with producing silver and copper from its current operations. 
 The
Company defines sustaining capital expenditures as, “costs incurred to sustain and maintain existing assets at current productive capacity and constant planned levels of productive output without resulting in an increase in the life of
assets, future earnings, or improvements in recovery or grade. Sustaining capital includes costs required to improve/enhance assets to minimum standards for reliability, environmental or safety requirements. Sustaining capital expenditures excludes
all expenditures at the Company’s new projects and certain expenditures at current operations which are deemed expansionary in nature.” 

Consolidated AISC includes total production cash costs incurred at the Company’s mining operations, including treatment and refining charges and
selling costs, which forms the basis of the Company’s total cash costs. Additionally, the Company includes sustaining capital expenditures and corporate general and administrative expenses. AISC by mine does not include certain corporate and
non-cash items such as general and administrative expense and share-based payments. The Company believes that this measure represents the total sustainable costs of producing silver and copper from current operations, and provides the Company and
other stakeholders of the Company with additional information of the Company’s operational performance and ability to generate cash flows. As the measure seeks to reflect the full cost of silver and copper production from current operations,
new project capital and expansionary capital at current operations are not included. Certain other cash expenditures, including tax payments, dividends and financing costs are also not included. 

  
 41 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 The following table provides a reconciliation of cash costs to cost of sales, as reported in the
Company’s condensed interim consolidated statement of income (loss) for the three months ended March 31, 2017 and 2016: 
  

																																					
	(In thousand of US dollars, unless stated)	 	  	 	 	  	 	 	 Three months ended
 March 31, 2017
	 	 	  	 	 	  	 	 	 Three months ended
 March 31, 2016
	 	 	  	 
	  	 	  	 	 	Yauricocha	 	 	Bolivar	 	 	Cusi	 	 	Consolidated	 	 	Yauricocha	 	 	Bolivar	 	 	Cusi	 	 	Consolidated 	 
	 Cash Cost per Tonne of Processed Ore
	 				 				 				 				 				 				 				 				 			
	 Cost of Sales
	 				 	 	27,752	 	 	 	9,203	 	 	 	3,239	 	 	 	40,195	 	 	 	15,604	 	 	 	7,453	 	 	 	2,231	 	 	 	25,288	 
	 Reverse: Workers Profit Sharing
	 				 	 	(1,307	) 	 	 	-    	 	 	 	-    	 	 	 	(1,307	) 	 	 	-    	 	 	 	-    	 	 	 	-    	 	 	 	-    	 
	 Reverse: D&A/Other adjustments
	 				 	 	(12,915	) 	 	 	(2,323	) 	 	 	(1,292	) 	 	 	(16,531	) 	 	 	(6,451	) 	 	 	(1,307	) 	 	 	(1,459	) 	 	 	(9,217	) 
	 Reverse: Variation in Finished Inventory
	 	 	 	 	 	 	992	 	 	 	(2,120	) 	 	 	(127	) 	 	 	(1,254	) 	 	 	2,327	 	 	 	(335	) 	 	 	1,734	 	 	 	3,726	 
	 Total Cash Cost
	 				 	 	14,522	 	 	 	4,760	 	 	 	1,820	 	 	 	21,102	 	 	 	11,480	 	 	 	5,811	 	 	 	2,506	 	 	 	19,797	 
	 Tonnes Processed
	 				 	 	251,180	 	 	 	243,974	 	 	 	34,541	 	 	 	529,695	 	 	 	207,580	 	 	 	218,886	 	 	 	49,753	 	 	 	476,219	 
	 Cash Cost per Tonne Processed
	 	US$		 	 	 	57.81	 	 	 	19.51	 	 	 	52.71	 	 	 	39.84	 	 	 	55.30	 	 	 	26.55	 	 	 	50.37	 	 	 	41.57	 

 The following table provides detailed information on Yauricocha’s cost of sales, cash cost, and all-in sustaining
cost per silver equivalent payable ounce and copper equivalent payable pound for the three months ended March 31, 2017 and 2016: 
 Yauricocha: 

 

													
	(In thousand of US dollars, unless stated)	  	  	 	  	Three months ended	 
	  	  	 	March 31, 2017	 	 	 	March 31, 2016	 
	 	 	 	 
	 Cash Cost (recovery) per silver payable ounce
	  				  				 			
	 Total Cash Cost
	  				  	 	14,522	 	 	 	11,480	 
	 Variation in Finished inventory
	  	 	 	 	  	 	(992	) 	 	 	(2,327	) 
	 Total Cash Cost of Sales
	  				  	 	13,530	 	 	 	9,153	 
	 Treatment and Refining Charges
	  				  	 	2,055	 	 	 	3,729	 
	 Selling Costs
	  				  	 	997	 	 	 	618	 
	 G&A Costs
	  				  	 	1,232	 	 	 	1,125	 
	 Sustaining Capital Expenditures
	  	 	 	 	  	 	1,612	 	 	 	1,340	 
	 All-In Sustaining Cash Costs
	  				  	 	19,426	 	 	 	15,965	 
	 Silver Equivalent Payable Ounces (000’s)
	  	 	 	 	  	 	1,832	 	 	 	1,053	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	8.26	 	 	 	8.81	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	7.39	 	 	 	8.69	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable
Ounce
	  	(US$	)	 	  	 	10.60	 	 	 	15.16	 
	 Copper Equivalent Payable Pounds
	  	 	 	 	  	 	15,671	 	 	 	9,009	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	0.97	 	 	 	1.03	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	0.86	 	 	 	1.02	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable
Pound
	  	(US$	)	 	  	 	1.24	 	 	 	1.77	 

  
 42 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 The following table provides detailed information on Bolivar’s cost of sales, cash cost, and
all-in sustaining cost per copper equivalent payable pound and silver equivalent payable ounce for the three months ended March 31, 2017 and 2016: 
 Bolivar:

  

													
	  	  	  	 	  	Three months ended	 
	(In thousand of US dollars, unless stated)	  	  	 	  	March 31, 2017	 	  	March 31, 2016	 
				
	 Cash Cost per copper payable pound
	  				  				  			
	 Total Cash Cost
	  				  	 	4,760	 	  	 	5,811	 
	 Variation in Finished inventory
	  	 	 	 	  	 	2,120	 	  	 	335	 
	 Total Cash Cost of Sales
	  				  	 	6,880	 	  	 	6,146	 
	 Treatment and Refining Charges
	  				  	 	1,543	 	  	 	1,579	 
	 Selling Costs
	  				  	 	856	 	  	 	686	 
	 G&A Costs
	  				  	 	574	 	  	 	617	 
	 Sustaining Capital Expenditures
	  	 	 	 	  	 	1,512	 	  	 	1,227	 
	 All-In Sustaining Cash Costs
	  				  	 	11,364	 	  	 	10,255	 
	 Silver Equivalent Payable Ounces (000’s)
	  	 	 	 	  	 	704	 	  	 	511	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	9.94	 	  	 	10.91	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	9.77	 	  	 	12.03	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable
Ounce
	  	(US$	)	 	  	 	16.14	 	  	 	20.07	 
	 Copper Equivalent Payable Pounds
	  	 	 	 	  	 	6,019	 	  	 	4,366	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.16	 	  	 	1.28	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.14	 	  	 	1.41	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable
Pound
	  	(US$	)	 	  	 	1.89	 	  	 	2.35	 

 The following table provides detailed information on Cusi’s cost of sales, cash cost, and all-in sustaining cost
per silver equivalent payable ounce and copper equivalent payable pound for the three months ended March 31, 2017 and 2016: 
 Cusi: 

 

													
	  	  	  	 	  	Three months ended	 
	(In thousand of US dollars, unless stated)	  	  	 	  	March 31, 2017	 	  	March 31, 2016	 
				
	 Cash Cost (recovery) per silver payable ounce
	  				  				  			
	 Total Cash Cost
	  				  	 	1,820	 	  	 	2,506	 
	 Variation in Finished inventory
	  	 	 	 	  	 	127	 	  	 	(1,734	) 
	 Total Cash Cost of Sales
	  				  	 	1,947	 	  	 	772	 
	 Treatment and Refining Charges
	  				  	 	584	 	  	 	580	 
	 Selling Costs
	  				  	 	151	 	  	 	151	 
	 G&A Costs
	  				  	 	101	 	  	 	136	 
	 Sustaining Capital Expenditures
	  	 	 	 	  	 	1,306	 	  	 	924	 
	 All-In Sustaining Cash Costs
	  				  	 	4,089	 	  	 	2,563	 
	 Silver Equivalent Payable Ounces (000’s)
	  	 	 	 	  	 	180	 	  	 	199	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	8.53	 	  	 	6.15	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	10.82	 	  	 	3.88	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable
Ounce
	  	(US$	)	 	  	 	22.72	 	  	 	12.88	 
	 Copper Equivalent Payable Pounds
	  	 	 	 	  	 	1,543	 	  	 	1,701	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.00	 	  	 	0.72	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.26	 	  	 	0.45	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable
Pound
	  	(US$	)	 	  	 	2.65	 	  	 	1.51	 

  
 43 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 Consolidated: 
  

													
	  	  	  	 	  	Three months ended	 
	 (In thousand of US dollars, unless stated)
	  	 	 	 	  	 	March 31, 2017	 	  	 	March 31, 2016	 
	 Total Cash Cost of Sales
	  	 	 	 	  	 	22,357	 	  	 	16,071	 
	 All-In Sustaining Cash Costs
	  	 	 	 	  	 	34,880	 	  	 	28,783	 
	 Silver Equivalent Payable Ounces (000’s)
	  	 	 	 	  	 	2,716	 	  	 	1,763	 
	 Cost of Sales per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	8.71	 	  	 	9.12	 
	 Cash Cost per Silver Equivalent Payable Ounce
	  	(US$	)	 	  	 	8.23	 	  	 	9.12	 
	 All-In Sustaining Cash Cost per Silver Equivalent Payable
Ounce
	  	(US$	)	 	  	 	12.84	 	  	 	16.33	 
	 Copper Equivalent Payable Pounds
	  	 	 	 	  	 	23,233	 	  	 	15,076	 
	 Cost of Sales per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	1.02	 	  	 	1.07	 
	 Cash Cost per Copper Equivalent Payable Pound
	  	(US$	)	 	  	 	0.96	 	  	 	1.07	 
	 All-In Sustaining Cash Cost per Copper Equivalent Payable
Pound
	  	(US$	)	 	  	 	1.50	 	  	 	1.91	 

 Additional non-IFRS measures 

The Company uses other financial measures, the presentation of which is not meant to be a substitute for other subtotals or totals presented in
accordance with IFRS, but rather should be evaluated in conjunction with such IFRS measures. The following other financial measures are used: 
  

	 	•	 	 Operating cash flows before movements in working capital - excludes the movement from period-to-period in working
capital items including trade and other receivables, prepaid expenses, deposits, inventories, trade and other payables and the effects of foreign exchange rates on these items. 

The terms described above do not have a standardized meaning prescribed by IFRS, and therefore the Company’s definitions are unlikely to be
comparable to similar measures presented by other companies. The Company’s management believes that their presentation provides useful information to investors because cash flows generated from operations before changes in working capital
excludes the movement in working capital items. This, in management’s view, provides useful information of the Company’s cash flows from operations and are considered to be meaningful in evaluating the Company’s past financial
performance or its future prospects. The most comparable IFRS measure is cash flows from operating activities. 
 12. CRITICAL ACCOUNTING POLICIES AND
ESTIMATES 
 Significant accounting judgments and estimates 

In the application of the Company’s accounting policies, which are described in note 2 of the Company’s December 31, 2016
consolidated financial statements, management is required to make judgments, estimates and assumptions about the effects of uncertain future events on the carrying amounts of assets and liabilities. The estimates and associated assumptions are based
on management’s best knowledge of the relevant facts and circumstances and historical experience. Actual results may differ from these estimates; potentially having a material future effect on the Company’s consolidated financial
statements. 
 The estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are
recognized in the period in which the estimate is revised if the 

  
 44 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
revision affects only that period, or in the period of the revision and future periods if the revision affects both current and future periods. 

The following are the significant judgments that management has made in the process of applying the Company’s accounting policies
and that have the most significant effect on the amounts recognized in the consolidated financial statements: 
  

	 	I.	 Impairment review of asset carrying values 

In accordance with the Company’s accounting policy, at every reporting period, the Company assesses whether there are any indicators
that the carrying value of its assets or CGUs may be impaired, which is a significant management judgment. Where there is an indication that the carrying amount of an asset may not be recoverable, the Company prepares a formal estimate of the
recoverable amount by analyzing discounted cash flows. The resulting valuations are particularly sensitive to changes in estimates such as long term commodity prices, exchange rates, sales volume, operating costs, and discount rates. In the event of
impairment, if there is an adverse change in any of the assumptions or estimates used in the discounted cash flow model, this could result in a further impairment of the asset. Also, in accordance with the Company’s accounting policy, the
Company capitalizes evaluation expenditures when there is a high degree of confidence that these costs are recoverable and have a probable future benefit. As at March 31, 2017, management assessed its mining property assets and exploration and
evaluation expenditures for impairment and determined that no impairment was required. 
  

	 	II.	 Mineral reserves and resources 

The Company estimates mineral reserves and resources based on information prepared by qualified persons as defined in accordance with the
Canadian Securities Administrators’ National Instrument (“NI”) 43-101. These estimates form the basis of the Company’s life of mine (“LOM”) plans, which are used for a number of important and significant accounting
purposes, including: the calculation of depletion expense and impairment charges, forecasting the timing of the payment of decommissioning costs and future taxes. There are significant uncertainties inherent in the estimation of mineral reserves and
the assumptions used which include commodity prices, production costs, recovery rates and exchange rates may change significantly when new information becomes available. Changes in assumptions could result in mineral reserves being revised, which in
turn would impact our depletion expense, asset carrying values and the provision for decommissioning costs. 
  

	 	III.	 Deferred tax assets and liabilities 

The Company’s management makes significant estimates and judgments in determining the Company’s tax expense for the period and
the deferred tax assets and liabilities. Management interprets tax legislation in a variety of jurisdictions and makes estimates of the expected timing of the reversal of deferred tax assets and liabilities. In addition, management makes estimates
related to expectations of future taxable income based on cash flows from operations and the application of existing tax laws in each jurisdiction. Assumptions used in the cash flow forecast are based on management’s estimates of future
production and sales volume, commodity prices, operating costs, capital expenditures, dividends, and decommissioning and reclamation expenditures. These estimates are subject to risk and uncertainty and could result in an adjustment to the deferred
tax provision and a corresponding credit or charge to the statement of loss. The 

  
 45 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
Company is subject to assessments by the various tax authorities who may interpret the tax laws differently. These differences may impact the final amount or the timing of the payment of taxes.
The Company provides for such differences where known based on management’s best estimates of the probable outcome of these matters. 
  

	 	IV.	 Decommissioning and restoration liabilities costs 

The Company’s provision for decommissioning and restoration costs is based on management’s best estimate of the present value
of the future cash outflows required to settle the liability. In determining the liability, management makes estimates about the future costs, inflation, foreign exchange rates, risks associated with the cash flows, and the applicable risk-free
interest rates for discounting future cash flows. Changes in any of these estimates could result in a change in the provision recognized by the Company. Also, the ultimate costs of environmental disturbance are uncertain and cost estimates can vary
in response to many factors including changes to the relevant legal requirements, the emergence of new restoration techniques or experience at other mine sites. 

Changes in decommissioning and restoration liabilities are recorded with a corresponding change to the carrying amounts of the assets to
which they relate. Adjustments made to the carrying amounts of the asset can result in a change to the depreciation charged in the consolidated statement of loss. 
  

	 	V.	 Functional currency 

The determination of a subsidiary’s functional currency often requires significant judgment where the primary economic environment
in which the subsidiary operates may not be clear. This can have a significant impact on our consolidated results based on the foreign currency translation methods described in the audited consolidated financial statements. 

Future accounting changes 
 The
following standards and amendments to existing standards have been published and are mandatory for annual periods beginning January 1, 2018, or later periods: 

IFRS 9, Financial Instruments: Recognition and measurement (“IFRS 9”) 

The IASB issued its completed version of IFRS 9, Financial Instruments (“IFRS 9”) in July 2014. The completed standard provides
revised guidance on the recognition and measurement of financial assets and liabilities. It also introduces a new expected credit loss model for calculating impairment for financial assets and liabilities. The new hedging guidance that was issued in
November 2013 is incorporated into this new final standard. 
 This final version of IFRS 9 will be effective for annual periods
beginning on or after January 1, 2018, with early adoption permitted. The Company is currently evaluating the extent of the impact of the adoption of this standard. 

IFRS 15, Revenue from Contracts with Customers (“IFRS 15”) 

IFRS 15, was issued in May 2014, which covers principles for reporting the nature, amount, timing and uncertainty of revenue and cash
flows arising from contracts with customers. IFRS 15 is effective for annual periods beginning on or after January 1, 2018. 

  
 46 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
The Company has not yet determined the potential impact of adopting this standard on its consolidated financial statements. 

IFRS 16, Leases (“IFRS 16”) 

In January 2016, the IASB issued this standard which is effective for periods beginning on or after January 1, 2019, which replaces
the current guidance in IAS 17, Leases, and is to be applied either retrospectively or a modified retrospective approach. Early adoption is permitted, but only in conjunction with IFRS 15, Revenue from Contracts with Customers. Under IAS 17, lessees
were required to make a distinction between a finance lease (on balance sheet) and an operating lease (off balance sheet). IFRS 16 now requires lessees to recognize a lease liability reflective of future lease payments and a “right-of-use
asset” for virtually all lease contracts. The Company has not yet determined the effect of adoption of IFRS 16 on its consolidated financial statements. 

Amendments to IAS 7, Statements of Cash Flows (“IAS 7”) 

The amendments require disclosures that enable users of financial statements to evaluate changes in liabilities arising from financing
activities, including both changes arising from cash flow and non-cash changes. The amendments apply prospectively for annual periods beginning on or after January 1, 2017, with earlier application permitted. The Company intends to adopt the
amendments to IAS 7 in its financial statements for the annual period beginning on January 1, 2017. The Company has determined that there is no impact on the adoption of this amendment within the condensed interim consolidated financial
statements. 
 13. OFF BALANCE SHEET ARRANGEMENTS 

The Company has no off-balance sheet arrangements as at March 31, 2017. 

14. DISCLOSURE CONTROLS AND INTERNAL CONTROLS OVER FINANCIAL REPORTING (“ICFR”) 

Disclosure controls and procedures 
 The Company’s
management is responsible for designing and maintaining adequate internal controls over financial reporting and disclosure controls and procedures, under the supervision of the Chief Executive Officer (“CEO”) and Chief Financial Officer
(“CFO”), to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the financial statements in accordance with IFRS. 

Management, including the CEO and CFO, has evaluated the effectiveness of the design and operation of our disclosure controls and procedures as at
March 31, 2017, as defined in the rules of the Canadian Securities Administration. Based on this evaluation, they concluded that our disclosure controls and procedures are effective in providing reasonable assurance that the information
required to be disclosed in reports we filed or submitted under Canadian securities 

  
 47 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
legislation was recorded, processed, summarized and reported within the time periods specified in those rules. 

Internal controls over financial reporting 
 Management,
including the CEO and CFO, is responsible for establishing and maintaining adequate internal control over financial reporting, and used the framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) to evaluate
the effectiveness of our controls in 2017. Based on this evaluation, management concluded that our internal control over financial reporting was effective as at March 31, 2017 and provided a reasonable assurance of the reliability of our
financial reporting and preparation of the financial statements. 
 No matter how well designed any system of internal control has inherent
limitations. Even systems determined to be effective can provide only reasonable assurance of the reliability of financial statement preparation and presentation. 

Changes in internal controls over financial reporting 
 There
have been no changes in ICFR during the three months ended March 31, 2017 that have materially affected, or are reasonably likely to materially affect, ICFR. 

15. CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS 

This discussion includes certain statements that may be deemed “forward-looking”. All statements in this discussion, other than statements of
historical fact, addressing future exploration drilling, exploration and development activities, production activities and events or developments that the Company expects, are forward looking statements. Although the Company believes the
expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results or developments may differ materially from those expressed in forward-looking
statements. Factors that could cause actual results to differ materially from those in forward-looking statements include market prices, exploitation and exploration successes, continued availability of capital and financing, general economic,
market or business conditions, and other factors which are discussed under “Risk Factors” in the Company’s Annual Information Form dated March 30, 2016 available at www.sedar.com under the Company’s name. 

The MD&A contains “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of
1995 and “forward looking information” within Canadian securities laws (collectively “forward-looking statements”) related to the Company and its operations, and in particular, the anticipated developments in the Company’s
operations in future periods, the Company’s planned exploration activities, the adequacy of the Company’s financial resources and other events or conditions that may occur in the future. Statements concerning mineral reserve and resource
estimates may also be deemed to constitute forward-looking statements to the extent that they involve estimates of the mineralization that will be encountered if and when the properties are developed or further developed. These statements relate to
analyses and other information that are based on forecasts of future results, estimates of amounts not yet determinable and assumptions of management. 

  
 48 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 These forward-looking statements include, but are not limited to, relate to, among other things: future
production of silver, lead, copper and zinc (the “metals”); future cash costs per ounce or pound of the metals; the price of the metals; the effects of domestic and foreign laws, regulations and government policies and actions affecting
the Company’s operations or potential future operations; future successful development of the Yauricocha, Bolivar and Cusi near-mine exploration projects and other exploration and development projects; the sufficiency of the Company’s
current working capital, anticipated operating cash flow or the Company’s ability to raise necessary funds; estimated production rates for the metals produced by the Company; timing of production; the estimated cost of sustaining capital;
ongoing or future development plans and capital replacement, improvement or remediation programs; the estimates of expected or anticipated economic returns from the Company’s mining projects; future sales of the metals, concentrates or other
future products produced by the Company; and the Company’s plans and expectations for its properties and operations. 
 Risks and uncertainties
relating to foreign currency fluctuations; risks inherent in the mining industry including environmental hazards, industrial accidents, unusual or unexpected geological formations, ground control problems, flooding and mud rushes; risks associated
with the estimation of mineral resources and the geology, grade and continuity of mineral deposits; the possibility that future exploration, development or mining results will not be consistent with the Company’s expectations; the potential for
and effects of labour disputes or other unanticipated difficulties or shortages of labour or interruptions in production; actual material mined varying from estimates of grade, tonnage, dilution and metallurgical and other characteristics; the
inherent uncertainty of pilot-mining activities and cost estimates, including the potential for unexpected costs/expenses and commodity price fluctuations; uncertain political and economic environments; changes in laws or policies, foreign taxation,
delays or the inability to obtain necessary governmental permits. 
 Any statements that express or involve discussions with respect to predictions,
expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as “expects”, “anticipates”, “plans”, “projects”,
“estimates”, “assumes”, “intends”, “strategy”, “goals”, “objectives”, “potential” or variations thereof, or stating that certain actions, events or results “may”,
“could”, “would”, “might” or “will” be taken, occur or be achieved, or the negative of any of these terms and similar expressions) are not statements of historical fact and may be forward-looking information.
Forward-looking information is subject to a variety of known and unknown risks, uncertainties and other factors that could cause actual events or results to differ from those expressed or implied by the forward-looking information, including,
without limitation: uncertainty of production and cost estimates for the Yauricocha Mine (as hereinafter defined), the Bolivar Mine (as hereinafter defined) and the Cusi Mine (as hereinafter defined); uncertainty of production at the Company’s
exploration and development properties; risks and uncertainties associated with developing and exploring new mines including start-up delays; risks and hazards associated with the business of mineral exploration, development and mining (including
operating in foreign jurisdictions, environmental hazards, industrial accidents, unusual or unexpected geological or structure formations, pressures, cave-ins and flooding); risks and uncertainties relating to the interpretation of drill results and
the geology, grade and continuity of the Company’s mineral deposits; risks related to the Company’s ability to obtain adequate financing for the Company’s planned development activities and to complete further exploration programs;
fluctuations in spot and forward markets for the metals and certain other commodities; risks related to obtaining long-term sales contracts or completing spot sales for the Company’s products; the Company’s history of losses and the
potential for 

  
 49 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 
future losses; risks related to general economic conditions, including recent market and world events and conditions; inadequate insurance, or inability to obtain insurance, to cover these risks
and hazards; relationships with and claims by local communities and indigenous populations; diminishing quantities or grades of mineral reserves as properties are mined; challenges to, or difficulty maintaining, the Company’s title to
properties and continued ownership thereof; risks related to the Company’s covenants with respect to the BCP Facility (as hereinafter defined); changes in national and local legislation, taxation, controls or regulations and political or
economic developments or changes in Canada, Mexico, Peru or other countries where they may carry on business; risks related to the delay in obtaining or failure to obtain required permits, or non-compliance with permits the Company has obtained;
increased costs and restrictions on operations due to compliance with environmental laws and regulations; regulations and pending legislation governing issues involving climate change, as well as the physical impacts of climate change; risks related
to reclamation activities on the Company’s properties; uncertainties related to title to the Company’s mineral properties and the surface rights thereon, including the Company’s ability to acquire, or economically acquire, the surface
rights to certain of the Company’s exploration and development projects; the Company’s ability to successfully acquire additional commercially mineable mineral rights; risks related to currency fluctuations (such as the Canadian dollar,
the United States dollar, the Peruvian sol and the Mexican peso); increased costs affecting the mining industry, including occasional high rates of inflation; increased competition in the mining industry for properties, qualified personnel and
management; risks related to some of the Company’s directors’ and officers’ involvement with other natural resource companies; the Company’s ability to attract and retain qualified personnel and management to grow the
Company’s business; risks related to estimates of deferred tax assets and liabilities; risks related to claims and legal proceedings and the Company’s ability to maintain adequate internal control over financial reporting. 

This list is not exhaustive of the factors that may affect any of the Company’s forward-looking statements. Forward looking statements are
statements about the future and are inherently uncertain, and the Company’s actual achievements or other future events or conditions may differ materially from those reflected in the forward-looking statements due to a variety of risks,
uncertainties and other factors, including, without limitation, those referred to in this MD&A under the heading ‘‘Other Risks and Uncertainties”. The Company’s forward-looking statements are based on the beliefs,
expectations and opinions of management on the date the statements are made, and the Company does not assume any obligation to update forward-looking statements if circumstances or management’s beliefs, expectations or opinions should change,
other than as required by applicable law. For the reasons set forth above, one should not place undue reliance on forward-looking statements. 
 Cautionary Note to
U.S. Investors Concerning Estimates of Inferred Resources 
 This document uses the term “Inferred Mineral Resources”. U.S. investors
are advised that while this term is recognized and required by Canadian regulations, the Securities and Exchange Commission (“SEC”) does not recognize it. Inferred Mineral Resources have a great amount of uncertainty as to their existence,
and great uncertainty as to their economic and legal feasibility. It cannot be assumed that all or any part of an Inferred Mineral Resource will ever be upgraded to a higher category. Under Canadian rules, estimates of Inferred Mineral Resources may
not form the basis of economic studies other than a Preliminary Economic Assessment (PEA). 

  
 50 

 Sierra Metals Inc. 

Management’s Discussion and Analysis 
 For the
three months ended March 31, 2017 
 (In thousands of United States dollars, unless otherwise stated) 

 
  

 This document also uses the terms “Measured and Indicated Mineral Resources”. The Company
advises U.S. investors that while these terms are recognized by Canadian regulations, the SEC does not recognize them. U.S. investors are cautioned not to assume that any part or all of mineral deposits included in these categories will ever be
converted into mineral reserves. Mineral resources that are not mineral reserves do not have demonstrated economic viability. Disclosure of “contained ounces” is permitted under Canadian regulations; however, the SEC normally only permits
the reporting of non-reserve mineralization as in-place tonnage and grade. 

  
 51

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