**UNITED STATESSECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 10-K**

(Mark One)

**x****  ANNUAL REPORT PURSUANT TO SECTION13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the fiscal year ended December 31, 2019or**

**o**** ****TRANSITIONREPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the transition period from _____ to _____Commission file number of the issuing entity: 333-207340-03**

**Central Index Key Number of the issuing entity:0001713226**

**UBS Commercial Mortgage Trust2017-C3**

**(exact name of the issuing entity as specified in itscharter)**

** **

**Central Index Key Number of the depositor: 0001532799**

**UBS Commercial MortgageSecuritization Corp.**

**(exact name of the depositor as specified in itscharter)**

** **

**Central Index Key Number of the sponsor: 0001685185**

**UBS AG, acting through its branchlocated at 1285 Avenue of the Americas, New York, New York**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001089877**

**KeyBank National Association**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001238163**

**Société Générale, New York Branch**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001542256**

**Natixis Real Estate Capital LLC**

**(exact name of the sponsor as specified in its charter)**

** **

**Central Index Key Number of the sponsor: 0001592182**

**LMF Commercial, LLC**

**(exact name of the sponsor as specified in its charter)**

**(formerly known as Rialto MortgageFinance, LLC)**

** **

| **New York****(State or other jurisdiction of  incorporation or organization of**

**the issuing entity)** | **38-4041060**

**38-4041061**

**(I.R.S. Employer**

**Identification Numbers)** |
|------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------|

**c/o Wells Fargo Bank, National Association**

**as Certificate Administrator**

**9062 Old Annapolis Road**

**Columbia, MD**

**(Address of principalexecutive offices of the issuing entity)**

**21045**

**(Zip Code)**

**Registrant’s telephone number,including area code:**

**(212) 713-2000**

Securities registered pursuant to Section 12(b) of the Act:

| Title of each class | Trading Symbol(s) | Name of each  exchange on which registered |
|---------------------|-------------------|--------------------------------------------|
| None                |              |                                       |

Securities registered pursuant to Section 12(g) of theAct:  None.

Indicate by check mark if the registrant is a well-knownseasoned issuer, as defined in Rule 405 of the Securities Act.  o Yes ⌧No

Indicate by check mark if the registrant is not required tofile reports pursuant to Section 13 or Section 15(d) of the Act.  o Yes ⌧No

Indicate by check mark whether the registrant (1) has filedall reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter periodthat the registrant was required to file such reports), and (2) has beensubject to such filing requirements for the past 90 days.  ⌧ Yes oNo

Indicate by check mark whether the registrant has submittedelectronically and posted on its corporate Web site, if any, every InteractiveData File required to be submitted and posted pursuant to Rule 405 ofRegulation S-T (Section 232.405 of this chapter) during the preceding 12 months(or for such shorter period that the registrant was required to submit and postsuch files).

Not applicable.

Indicate by check mark if disclosure of delinquent filerspursuant to Item 405 of Regulation S-K (Section 229.405 of this chapter) is notcontained herein, and will not be contained, to the best of registrant’sknowledge, in definitive proxy or information statements incorporated byreference in Part III of this Form 10-K or any amendment to this Form10-K.   

Not applicable.

Indicate by check mark whether the registrant is a largeaccelerated filer, an accelerated filer, a non-accelerated filer, a smaller reportingcompany, or an emerging growth company. See the definitions of “largeaccelerated filer,” “accelerated filer,” “smaller reporting company,” and“emerging growth company” in Rule 12b-2 of the Exchange Act.

Large acceleratedfiler        o                                                                                                       Acceleratedfiler                                     o

Non-acceleratedfiler          ⌧  (Do not check if asmaller reporting company)                          Smaller reportingcompany                    o

                                                                                                                                                       Emerging growthcompany                    o

If an emerging growth company, indicate by check mark if theregistrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant toSection 13(a) of the Exchange Act.  o

Indicate by check mark whether the registrant is a shellcompany (as defined in Rule 12b-2 of the Act).  o Yes ⌧ No

State the aggregate market value of the voting and non-votingcommon equity held by non-affiliates computed by reference to the price atwhich the common equity was last sold, or the average bid and asked price ofsuch common equity, as of the last business day of the registrant’s mostrecently completed second fiscal quarter.

Not applicable.

Indicate by check mark whether the registrant has filed all documentsand reports required to be filed by Section 12, 13 or 15(d) of the SecuritiesExchange Act of 1934 subsequent to the distribution of securities under a planconfirmed by a court.  o Yes oNo

Not applicable.

Indicate the number of shares outstanding of each of theregistrant’s classes of common stock, as of the latest practicable date.

Not applicable.

**DOCUMENTS INCORPORATED BY REFERENCE**

** **

List hereunder the following documents if incorporated byreference and the Part of the Form 10-K (e.g., Part I, Part II, etc.) intowhich the document is incorporated: (1) Any annual report to security holders;(2) Any proxy or information statement; and (3) Any prospectus filed pursuantto Rule 424(b) or (c) under the Securities Act of 1933. The listed documents shouldbe clearly described for identification purposes (e.g., annual report tosecurity holders for fiscal year ended December 24, 1980).

Not applicable.

 

** **

**EXPLANATORY NOTES**

The Great Valley Commerce Center Mortgage Loanand the IC Leased Fee Hotel Portfolio Mortgage Loan, which constitutedapproximately 3.9% and 3.8%, respectively, of the asset pool of the issuingentity as of its cut-off date, are each an asset of the issuing entity and areeach part of a loan combination that includes (a) with respect to the GreatValley Commerce Center Mortgage Loan which is an asset of the issuing entityand one other *pari passu* loan, which is not an asset of the issuingentity and (b) with respect to the IC Leased Fee Hotel Portfolio Mortgage Loanwhich is an asset of the issuing entity and three other *pari passu*loans, which are not assets of the issuing entity. These loan combinations,including the Great Valley Commerce Center Mortgage Loan and the IC Leased FeeHotel Portfolio Mortgage Loan, are being serviced and administered pursuant tothe Pooling and Servicing Agreement, which is incorporated by reference asExhibit 4.1 to this Annual Report on Form 10-K. 

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on the ExhibitIndex) with respect to the 245 Park Avenue Mortgage Loan, which constitutedapproximately 5.4% of the asset pool of the issuing entity as of its cut-offdate.  The 245 Park Avenue Mortgage Loan is an asset of the issuing entityand is part of a loan combination that includes the 245 Park Avenue MortgageLoan and nineteen other *pari passu* loans and five subordinate companionloans, which are not assets of the issuing entity. A *pari passu* portionof the loan combination was securitized in the 245 Park Avenue Trust 2017-245Ptransaction (the “245 Park Avenue Trust 2017-245P Transaction”). Thisloan combination, including the 245 Park Avenue Mortgage Loan, is beingserviced and administered pursuant to the trust and servicing agreement for the245 Park Avenue Trust 2017-245P Transaction, which is incorporated by referenceas Exhibit 4.2 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the Del Amo Fashion Center Mortgage Loan, whichconstituted approximately 7.1% of the asset pool of the issuing entity as ofits cut-off date.  The Del Amo Fashion Center Mortgage Loan is an asset ofthe issuing entity and is part of a loan combination that includes the Del AmoFashion Center Mortgage Loan and thirty-two other *pari passu* loans andtwelve subordinate companion loans, each of which are not assets of the issuingentity. A *pari passu* portion of the loan combination was securitized inthe Del Amo Fashion Center Trust 2017-AMO transaction (the “DAFC 2017-AMOTransaction”). This loan combination, including the Del Amo Fashion CenterMortgage Loan, is being serviced and administered pursuant to the trust andservicing agreement for the DAFC 2017-AMO Transaction, which is incorporated byreference as Exhibit 4.3 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the TZA Multifamily Portfolio I Mortgage Loanand the Park West Village Mortgage Loan, which constituted approximately 7.1%and 4.2%, respectively, of the asset pool of the issuing entity as of itscut-off date.  The TZA Multifamily Portfolio I Mortgage Loan and the Park WestVillage Mortgage Loan are each an asset of the issuing entity and are each partof a loan combination that includes (a) with respect to the TZA MultifamilyPortfolio I Mortgage Loan and two other *pari passu* loans, which are notassets of the issuing entity or (b) with respect to the Park West VillageMortgage Loan and five other *pari passu* loans and three subordinatecompanion loans, which are not assets of the issuing entity. A *pari passu*portion of each loan combination was securitized in the UBS Commercial MortgageTrust 2017-C2 transaction, Commission File Number 333-207340-02 (the “UBS2017-C2 Transaction”). These loan combinations, including the TZAMultifamily Portfolio I Mortgage Loan and the Park West Village Mortgage Loan,are being serviced and administered pursuant to the pooling and servicingagreement for the UBS 2017-C2 Transaction, which is incorporated by referenceas Exhibit 4.4 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the JW Marriott Chicago Mortgage Loan and theCenter 78 Mortgage Loan, which constituted approximately 4.0% and 4.0%,respectively, of the asset pool of the issuing entity as of its cut-off date. The JW Marriott Chicago Mortgage Loan and Center 78 Mortgage Loan are each anasset of the issuing entity and are each part of a loan combination thatincludes (a) with respect to the JW Marriott Chicago Mortgage Loan and twoother *pari passu* loans and three subordinate companion loans, which arenot assets of the issuing entity or (b) with respect to the Center 78 MortgageLoan and one other *pari passu* loan and one subordinate companion loan,which are not assets of the issuing entity. These loan combinations, includingthe JW Marriott Chicago Mortgage Loan and the Center 78 Mortgage Loan, wereserviced under the Pooling and Servicing Agreement for the issuing entity priorto the closing of the securitization of a *pari passu* portion of the JWMarriott Chicago  loan combination and the Center 78  loancombination in the CSAIL 2017-CX9 Commercial Mortgage Trust transaction,Commission File Number 333-207361-06 (the “CSAIL 2017-CX9 Transaction”). After the closing of the CSAIL 2017-CX9 Transaction on September 29, 2017,these loan combinations, including the JW Marriott Chicago Mortgage Loan andthe Center 78 Mortgage Loan were, and will continue to be, serviced andadministered pursuant to the pooling and servicing agreement with respect tothe CSAIL 2017-CX9 Transaction, which is incorporated by reference as Exhibit4.5 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to The District Mortgage Loan, which constitutedapproximately 3.5% of the asset pool of the issuing entity as of its cut-offdate.  The District Mortgage Loan is an asset of the issuing entity and ispart of a loan combination that includes The District Mortgage Loan and fourother *pari passu* loans, which are not assets of the issuing entity. Thisloan combination, including The District Mortgage Loan, was serviced under thePooling and Servicing Agreement for the issuing entity prior to the closing ofthe securitization of the other *pari passu* portion of The District loan combination in the UBS Commercial Mortgage Trust 2017-C4 transaction,Commission File Number 333-207340-04 (the “UBS 2017-C4 Transaction”). After the closing of the UBS 2017-C4 Transaction on October 18, 2017, this loancombination, including The District Mortgage Loan was, and will continue to be,serviced and administered pursuant to the pooling and servicing agreement withrespect to the UBS 2017-C4 Transaction, which is incorporated by reference asExhibit 4.6 to this Annual Report on Form 10-K.

The Exhibit Index describesexhibits provided by certain parties (in their capacities indicated on theExhibit Index) with respect to the American Cancer Society Center Mortgage Loanand the OKC Outlets Mortgage Loan, which constituted approximately 6.1% and5.2%, respectively, of the asset pool of the issuing entity as of its cut-offdate.  The American Cancer Society Center Mortgage Loan and OKC OutletsMortgage Loan are each an asset of the issuing entity and are each part of aloan combination that includes (a) with respect to the American Cancer SocietyCenter Mortgage Loan and two other *pari passu* loans, which are notassets of the issuing entity or (b) with respect to the OKC Outlets MortgageLoan and one other *pari passu* loan, which is not an asset of the issuingentity.These loan combinations, including the American Cancer Society CenterMortgage Loan and the OKC Outlets Mortgage Loan, were serviced under thePooling and Servicing Agreement for the issuing entity prior to the closing ofthe securitization of a *pari passu* portion of the American CancerSociety Center  loan combination and the OKC Outlets  loancombination in the Morgan Stanley Bank of America Merrill Lynch Trust 2017 C34transaction, Commission File Number 333-206847-07 (the “MSBAM 2017-C34Transaction”).  After the closing of the MSBAM 2017-C34 Transaction onOctober 19, 2017, these loan combinations, including the American CancerSociety Center Mortgage Loan and the OKC Outlets Mortgage Loan were, and willcontinue to be, serviced and administered pursuant to the pooling and servicingagreement with respect to the MSBAM 2017-C34 Transaction, which is incorporatedby reference as Exhibit 4.7 to this Annual Report on Form 10-K.

The master servicer of a poolingand servicing agreement or trust and servicing agreement also functions as theprimary servicer of the related mortgage loans serviced and administeredpursuant to such agreement unless a separate primary servicer is identifiedherein.  If this report does not identify a separate primary servicer, theservicer compliance statement provided by the master servicer under any suchagreement also encompasses its responsibilities as primary servicer of the relatedmortgage loan or mortgage loans.

Midland Loan Services, a Divisionof PNC Bank, National Association is the master servicer and special servicerof the mortgage loans serviced under the Pooling and Servicing Agreement andthe primary servicer and special servicer of the TZA Multifamily Portfolio IMortgage Loan and the Park West Village Mortgage Loan. As a result, MidlandLoan Services, a Division of PNC Bank, National Association is a “servicer” asdefined in Item 1108(a)(2)(iii) of Regulation AB, in the capacities describedabove, because it is servicing mortgage loans that constituted 10% or more ofthe assets of the issuing entity as of its cut-off date. The assessments ofcompliance with applicable servicing criteria, accountants’ attestation reportsand servicer compliance statements delivered by Midland Loan Services, aDivision of PNC Bank, National Association in the capacities described aboveare listed in the Exhibit Index.

Wells Fargo Bank, NationalAssociation is the certificate administrator of the mortgage loans servicedunder the Pooling and Servicing Agreement and the primary servicer of theAmerican Cancer Society Center Mortgage Loan, the 245 Park Avenue MortgageLoan, the OKC Outlets Mortgage Loan and The District Mortgage Loan. As aresult, Wells Fargo Bank, National Association is a “servicer” as defined inItem 1108(a)(2)(iii) of Regulation AB, in the capacities described above,because it is servicing mortgage loans that constituted 10% or more of theassets of the issuing entity as of its cut-off date. The assessments ofcompliance with applicable servicing criteria, accountants’ attestation reportsand servicer compliance statements delivered by Wells Fargo Bank, NationalAssociation in the capacities described above are listed in the Exhibit Index.

Wells Fargo Bank, National Association is the custodian ofthe mortgage loans serviced under the Pooling and Servicing Agreement, the TZAMultifamily Portfolio I Mortgage Loan, the Park West Village Mortgage Loan, theDel Amo Fashion Center Mortgage Loan, the American Cancer Society CenterMortgage Loan, the 245 Park Avenue Mortgage Loan, the OKC Outlets MortgageLoan, the JW Marriott Chicago Mortgage Loan, the Center 78 Mortgage Loan andThe District Mortgage Loan.  As a result, Wells Fargo Bank, NationalAssociation is a servicing function participant in the capacities describedabove, because it is servicing mortgage loans that constituted 5% or more ofthe assets of the issuing entity as of its cut-off date. The assessments of compliancewith applicable servicing criteria and accountants’ attestation reportsdelivered by Wells Fargo Bank, National Association in the capacities describedabove are listed in the Exhibit Index.

Park Bridge Lender Services LLC is the operating advisor ofthe mortgage loans serviced under the Pooling and Servicing Agreement, the TZAMultifamily Portfolio I Mortgage Loan, the Del Amo Fashion Center MortgageLoan, the American Cancer Society Center Mortgage Loan, the OKC OutletsMortgage Loan and the Park West Village Mortgage Loan.  As a result, ParkBridge Lender Services LLC is a servicing function participant in thecapacities described above, because it is servicing mortgage loans thatconstituted 5% or more of the assets of the issuing entity as of its cut-offdate. The assessments of compliance with applicable servicing criteria andaccountants’ attestation reports delivered by Park Bridge Lender Services LLCin the capacities described above are listed in the Exhibit Index.

KeyBank National Association isthe primary servicer of the Del Amo Fashion Center Mortgage Loan, the Center 78Mortgage Loan and the JW Marriott Chicago Mortgage Loan. As a result, KeyBankNational Association is a “servicer” as defined in Item 1108(a)(2)(iii) ofRegulation AB, in the capacities described above, because it is servicingmortgage loans that constituted 10% or more of the assets of the issuing entityas of its cut-off date. The assessments of compliance with applicable servicingcriteria, accountants’ attestation reports and servicer compliance statementsdelivered by KeyBank National Association in the capacities described above arelisted in the Exhibit Index.

Rialto Capital Advisors, LLC isthe special servicer of the Center 78 Mortgage Loan, the JW Marriott Chicago MortgageLoan and The District Mortgage Loan. As a result, Rialto Capital Advisors, LLCis a “servicer” as defined in Item 1108(a)(2)(iii) of Regulation AB, in thecapacities described above, because it is servicing mortgage loans thatconstituted 10% or more of the assets of the issuing entity as of its cut-offdate. The assessments of compliance with applicable servicing criteria,accountants’ attestation reports and servicer compliance statements deliveredby Rialto Capital Advisors, LLC in the capacities described above are listed inthe Exhibit Index.

Pentalpha Surveillance LLC is the operating advisor of theCenter 78 Mortgage Loan, the JW Marriott Chicago Mortgage Loan and The DistrictMortgage Loan.  As a result, Pentalpha Surveillance LLC is a servicingfunction participant in the capacities described above, because it is servicingmortgage loans that constituted 5% or more of the assets of the issuing entityas of its cut-off date. The assessments of compliance with applicable servicingcriteria and accountants’ attestation reports delivered by PentalphaSurveillance LLC in the capacities described above are listed in the ExhibitIndex.

LNR Partners, LLC is the specialservicer of the American Cancer Society Center Mortgage Loan and the OKCOutlets Mortgage Loan. As a result, LNR Partners, LLC is a “servicer” asdefined in Item 1108(a)(2)(iii) of Regulation AB, in the capacities describedabove, because it is servicing mortgage loans that constituted 10% or more ofthe assets of the issuing entity as of its cut-off date. The assessments ofcompliance with applicable servicing criteria, accountants’ attestation reportsand servicer compliance statements delivered by LNR Partners, LLC in thecapacities described above are listed in the Exhibit Index.

Wells Fargo Bank, NationalAssociation acts as trustee of the mortgage loans serviced under the Poolingand Servicing Agreement, the Park West Village Mortgage Loan, the TZAMultifamily Portfolio I Mortgage Loan, the Center 78 Mortgage Loan and the JWMarriott Chicago Mortgage Loan.  Pursuant to the Pooling and ServicingAgreement, the pooling and servicing agreement for the UBS 2017-C2 Transactionand the pooling and servicing agreement for the CSAIL 2017-CX9 Transaction, thetrustee is required to provide an assessment of compliance with applicableservicing criteria solely with respect to Item 1122(d)(2)(iii) of Regulation AB(regarding advances of funds or guarantees regarding collections, cash flows ordistributions, and any interest or other fees charged for such advances, aremade, reviewed and approved as specified in the transaction agreements).However, during the reporting period, the trustee did not perform any servicingfunction with respect to the servicing criteria specified in Item 1122(d)(2)(iii)of Regulation AB.  The master servicer or the special servicer, to theextent required, performed the servicing function identified with respect toItem 1122(d)(2)(iii) of Regulation AB, and each such party included Item1122(d)(2)(iii) of Regulation AB in the assessment of compliance withapplicable servicing criteria and accountant’s attestation report for thesubject transaction.  As a result, this Annual Report on Form 10-K doesnot include an assessment of compliance with applicable servicing criteria ofthe trustee. One or more other servicers of the mortgage loans serviced underthe Pooling and Servicing Agreement, the Park West Village Mortgage Loan, theTZA Multifamily Portfolio I Mortgage Loan, the Center 78 Mortgage Loan and theJW Marriott Chicago Mortgage Loan have delivered one or more assessments ofcompliance with respect to Item 1122(d)(2)(iii) of Regulation AB.

Wilmington Trust, NationalAssociation acts as trustee of the 245 Park Avenue Mortgage Loan, the Del AmoFashion Center Mortgage Loan, The District Mortgage Loan, the OKC OutletsMortgage Loan and the American Cancer Society Center Mortgage Loan. Pursuant to the trust and servicing agreement for the 245 Park Avenue Trust2017-245P Transaction, the trust and servicing agreement for the DAFC 2017-AMOTransaction, the pooling and servicing agreement for the UBS 2017-C4Transaction and the pooling and servicing agreement for the MSBAM 2017-C34Transaction, the trustee is required to provide an assessment of compliancewith applicable servicing criteria solely with respect to Item 1122(d)(2)(iii)of Regulation AB (regarding advances of funds or guarantees regardingcollections, cash flows or distributions, and any interest or other feescharged for such advances, are made, reviewed and approved as specified in thetransaction agreements). However, during the reporting period, the trustee didnot perform any servicing function with respect to the servicing criteriaspecified in Item 1122(d)(2)(iii) of Regulation AB.  The master serviceror the special servicer, to the extent required, performed the servicingfunction identified with respect to Item 1122(d)(2)(iii) of Regulation AB, andeach such party included Item 1122(d)(2)(iii) of Regulation AB in theassessment of compliance with applicable servicing criteria and accountant’sattestation report for the subject transaction.  As a result, this AnnualReport on Form 10-K does not include an assessment of compliance withapplicable servicing criteria of the trustee. One or more other servicers ofthe 245 Park Avenue Mortgage Loan, the Del Amo Fashion Center Mortgage Loan,The District Mortgage Loan, the OKC Outlets Mortgage Loan and the AmericanCancer Society Center Mortgage Loan have delivered one or more assessments ofcompliance with respect to Item 1122(d)(2)(iii) of Regulation AB.

This Annual Report on Form 10-Kincludes assessments of compliance with applicable servicing criteria andaccountants’ attestation reports from CoreLogic Commercial Real EstateServices, Inc. and National Tax Search, LLC.  These entities were engagedby the primary servicer of the 245 Park Avenue Mortgage Loan, The DistrictMortgage Loan, the OKC Outlets Mortgage Loan and the American Cancer SocietyCenter Mortgage Loan to remit tax payments received from the escrow accounts ofborrowers to local taxing authorities, to report tax amounts due, to verify taxparcel information, and to verify non-escrow tax payments. These servicingfunctions are included within the servicing criteria set forth in Items1122(d)(4)(xi) and 1122(d)(4)(xii) of Regulation AB.  Therefore, under theprinciples-based definition of “servicer” set forth in Item 1101(j) ofRegulation AB that looks to the functions that an entity performs, thesevendors are “servicers” for the purposes of Item 1122 of Regulation AB.  *See*Compliance and Disclosure Interpretations, Section 301.01 (Item 1101(j)).

Theassessments of compliance with applicable servicing criteria, accountants’attestation reports and servicer compliance statements of the certificate administratorof the 245 Park Avenue Mortgage Loan, the Del Amo Fashion Center Mortgage Loan,the Park West Village Mortgage Loan, the TZA Multifamily Portfolio I MortgageLoan, the Center 78 Mortgage Loan, the JW Marriott Chicago Mortgage Loan, TheDistrict Mortgage Loan, the OKC Outlets Mortgage Loan and the American CancerSociety Center Mortgage Loan listed on the Exhibit Index are omitted from thisAnnual Report on Form 10-K as the certificate administrator pursuant to therelated pooling and servicing agreement or trust and servicing agreement doesnot perform any activities that address servicing criteria with respect to theissuing entity and because they are each not a “servicer” that meets thecriteria in Item 1108(a)(2)(i) through (iii) of Regulation AB.

With respect to the *pari passu*loan combination that includes the 245 Park Avenue Mortgage Loan and the DelAmo Fashion Center Mortgage Loan, the servicer compliance statements of AEGONUSA Realty Advisors, LLC as special servicer of the 245 Park Avenue MortgageLoan and Cohen Financial, a Division of Truist Bank (f/k/a Cohen Financial, aDivision of SunTrust Bank) as special servicer of the Del Amo Fashion CenterMortgage Loan, listed on the Exhibit Index are omitted from this Annual Reporton Form 10-K as they are not required by Item 1123 of Regulation AB to beincluded on this Annual Report on Form 10-K because they are each anunaffiliated party that is not a “servicer” that meets the criteria in Item1108(a)(2)(i) through (iii) of Regulation AB.

**PART I**

**Item 1.  Business.**

Omitted.

**Item 1A.  Risk Factors.**

Omitted.

**Item 1B.  Unresolved Staff Comments.**

None.

**Item 2.  Properties.**

Omitted.

**Item 3.  Legal Proceedings.**

Omitted.

**Item 4.  Mine Safety Disclosures.**

Not applicable.

**PART II**

**Item 5.  Market for Registrant’s Common Equity,Related Stockholder Matters and Issuer Purchases of Equity Securities.**

Omitted.

**Item 6.  Selected Financial Data.**

Omitted.

**Item 7.  Management’s Discussion and Analysis ofFinancial Condition and Results of Operations.**

Omitted.

**Item 7A.  Quantitative and Qualitative DisclosuresAbout Market Risk.**

Omitted.

**Item 8.  Financial Statements and Supplementary Data.**

Omitted.

**Item 9.  Changes in and Disagreements WithAccountants on Accounting and Financial Disclosure.**

Omitted.

**Item 9A.  Controls and Procedures.**

Omitted.

**Item 9B.  Other Information.**

None.

**PART III**

**Item 10.  Directors, Executive Officers and CorporateGovernance.**

Omitted.

**Item 11.  Executive Compensation.**

Omitted.

**Item 12.  Security Ownership of Certain BeneficialOwners and Management and Related Stockholder Matters.**

Omitted.

**Item 13.  Certain Relationships and RelatedTransactions, and Director Independence.**

Omitted.

**Item 14.  Principal Accounting Fees and Services.**

Omitted.

**ADDITIONAL DISCLOSURE ITEMS FOR REGULATION AB**

**Item 1112(b) of Regulation AB, Significant ObligorFinancial Information.**

No single obligor represents 10% or more of the pool assetsheld by the issuing entity. 

**Item 1114(b)(2) of Regulation AB, Significant EnhancementProvider Financial Information.**

No entity or group of affiliated entities provides any external creditenhancement or other support for the certificates within this transaction asdescribed under Item 1114(a) of Regulation AB.

**Item 1115(b) of Regulation AB, Certain DerivativesInstruments (Financial Information).**

No entity or group of affiliated entities provides anyderivative instruments or other support for the certificates within thistransaction as described under Item 1115 of Regulation AB.

**Item 1117 of Regulation AB, Legal Proceedings.**

The registrant knows of no material pending legal proceedinginvolving the trust or any party related to the trust, other than routinelitigation incidental to the duties of those respective parties, and the following,with respect to Wells Fargo Bank, National Association, as certificateadministrator, as trustee and as custodian.

Beginning on June 18, 2014, a group of institutionalinvestors filed civil complaints in the Supreme Court of the State of New York,New York County, and later the U.S. District Court for the Southern District ofNew York, against Wells Fargo Bank, N.A., (“Wells Fargo Bank”) in itscapacity as trustee for certain residential mortgage backed securities (“RMBS”)trusts.  The complaints against Wells Fargo Bank alleged that the trusteecaused losses to investors and asserted causes of action based upon, amongother things, the trustee's alleged failure to: (i) notify and enforcerepurchase obligations of mortgage loan sellers for purported breaches ofrepresentations and warranties, (ii) notify investors of alleged events ofdefault, and (iii) abide by appropriate standards of care following allegedevents of default. Relief sought included money damages in an unspecifiedamount, reimbursement of expenses, and equitable relief. In November 2018,Wells Fargo Bank reached an agreement, in which it denied any wrongdoing, toresolve such claims on a classwide basis for the 271 RMBS trusts atissue.  On May 6, 2019, the court entered an order approving thesettlement agreement.  Separate lawsuits against Wells Fargo Bank makingsimilar allegations filed by certain other institutional investors concerningseveral RMBS trusts in New York federal and state court are not covered by theagreement.  With respect to such litigations, Wells Fargo Bank believesplaintiffs' claims are without merit and intends to contest the claimsvigorously, but there can be no assurances as to the outcome of the litigationsor the possible impact of the litigations on Wells Fargo Bank or the RMBStrusts.

**Item 1119 of Regulation AB, Affiliations and CertainRelationships and Related Transactions.**

The information regarding this Item has been previouslyprovided in the prospectus of the Registrant relating to the issuing entityfiled on August 31, 2017 pursuant to Rule 424(b)(2).

**Item 1122 of Regulation AB, Compliance with ApplicableServicing Criteria.**

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the mortgage loans are attachedhereto under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit Zto the Pooling and Servicing Agreement incorporated by reference as Exhibit 4.1to this Annual Report on Form 10-K is a chart identifying the entitiesparticipating in a servicing function for the transaction responsible for eachapplicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the 245 Park Avenue Mortgage Loan,which is being serviced and administered pursuant to the trust and servicingagreement for the 245 Park Avenue Trust 2017-245P Transaction, are attachedhereto under Item 15 to this Annual Report on Form 10-K. Attached as Exhibit Lto the trust and servicing agreement for the 245 Park Avenue Trust 2017-245PTransaction incorporated by reference as Exhibit 4.2 to this Annual Report onForm 10-K is a chart identifying the entities participating in a servicingfunction for the 245 Park Avenue Trust 2017-245P Transaction responsible foreach applicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the Del Amo Fashion Center MortgageLoan, which is being serviced and administered pursuant to the trust andservicing agreement for the DAFC 2017-AMO Transaction, are attached heretounder Item 15 to this Annual Report on Form 10-K. Attached as Exhibit L to thetrust and servicing agreement for the DAFC 2017-AMO Transaction incorporated byreference as Exhibit 4.3 to this Annual Report on Form 10-K is a chartidentifying the entities participating in a servicing function for the DAFC2017-AMO Transaction responsible for each applicable servicing criteria setforth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the TZA Multifamily Portfolio IMortgage Loan and the Park West Village Mortgage Loan, which are being servicedand administered pursuant to the pooling and servicing agreement for the UBS2017-C2 Transaction, are attached hereto under Item 15 to this Annual Report onForm 10-K. Attached as Exhibit Z to the pooling and servicing agreement for theUBS 2017-C2 Transaction incorporated by reference as Exhibit 4.4 to this AnnualReport on Form 10-K is a chart identifying the entities participating in aservicing function for the UBS 2017-C2 Transaction responsible for eachapplicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the Center 78 Mortgage Loan and theJW Marriott Chicago Mortgage Loan, which are being serviced and administeredpursuant to the pooling and servicing agreement for the CSAIL 2017-CX9Transaction, are attached hereto under Item 15 to this Annual Report on Form10-K. Attached as Exhibit AA to the pooling and servicing agreement for theCSAIL 2017-CX9 Transaction incorporated by reference as Exhibit 4.5 to thisAnnual Report on Form 10-K is a chart identifying the entities participating ina servicing function for the CSAIL 2017-CX9 Transaction responsible for eachapplicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to The District Mortgage Loan, which isbeing serviced and administered pursuant to the pooling and servicing agreementfor the UBS 2017-C4 Transaction, are attached hereto under Item 15 to thisAnnual Report on Form 10-K. Attached as Exhibit Z to the pooling and servicingagreement for the UBS 2017-C4 Transaction incorporated by reference as Exhibit4.6 to this Annual Report on Form 10-K is a chart identifying the entitiesparticipating in a servicing function for the UBS 2017-C4 Transactionresponsible for each applicable servicing criteria set forth in Item 1122(d).

The reports on assessments of compliance with the servicingcriteria for asset-backed securities and related attestation reports on suchassessments of compliance with respect to the American Cancer Society CenterMortgage Loan and the OKC Outlets Mortgage Loan, which are being serviced andadministered pursuant to the pooling and servicing agreement for the MSBAM2017-C34 Transaction, are attached hereto under Item 15 to this Annual Reporton Form 10-K. Attached as Exhibit AA to the pooling and servicing agreement forthe MSBAM 2017-C34 Transaction incorporated by reference as Exhibit 4.7 to thisAnnual Report on Form 10-K is a chart identifying the entities participating ina servicing function for the MSBAM 2017-C34 Transaction responsible for eachapplicable servicing criteria set forth in Item 1122(d).

The report on assessment of compliance with applicableservicing criteria furnished pursuant to Item 1122 of Regulation AB by MidlandLoan Services, a Division of PNC Bank National Association (“Midland”)discloses that a material instance of noncompliance occurred, as describedbelow:

Material Instance of Noncompliance

In certain instances, the Schedule AL Files (Item 1125 ofRegulation AB) were not reported in accordance with the terms specified in thetransaction agreements, in conflict with Item 1122(d)(3)(i): “Reports toinvestors, including those to be filed with the Commission, are maintained inaccordance with the transaction agreements and applicable Commissionrequirements. Specifically, such reports: (A) Are prepared in accordance withtimeframes and other terms set forth in the transaction agreements”.  Thenoncompliance consisted of omitted or inaccurately reported fields as describedin (1) and (2) below.  (1) In connection with other enhancements Midlandmade to its manual Schedule AL process, starting in April 2019, Midlanddeveloped and implemented new Schedule AL reporting templates for eachapplicable CMBS transaction that closed prior to April 2019 and for eachapplicable CMBS transaction going forward.  Related to this, Midland madecertain template setup errors, along with related and other manual inputting ofinformation errors, and the errors were not identified prior to submission ofthe applicable Schedule AL Files in certain cases due to breakdowns in qualitycontrol.  (2) In one applicable transaction, the related Schedule AL Filefor a given month was not saved properly resulting in the prior month'sSchedule AL File being submitted for the given month instead of the correctSchedule AL File. 

The identified instances did not involve the servicing ofassets included in this securitization.

Steps Taken to Remedy the Material Instance of Noncompliance

Midland’s Schedule AL reporting process was enhanced in Aprilof 2019, however, the process remained manual throughout the 2019 calendaryear.  Errors relating to certain Schedule AL Files during 2019 wereidentified during the related audit.  Following identification, Midlandmade staffing changes and additional enhancements and improvements to itsprocesses and procedures to support its Schedule AL reporting obligations andexpects to move to an automated solution for this process.  

Midland is currently remediating the Schedule AL reportingfor certain of the CMBS transactions found to be incorrect.

**Item 1123 of Regulation AB, Servicer Compliance Statement.**

The servicer compliance statements are attached as Exhibitsto this Annual Report on Form 10-K.

**PART IV**

**Item 15. Exhibits, Financial Statement Schedules**

(a) The following is a list of documents filed as part ofthis Annual Report on Form 10-K:

(1) Not applicable

(2) Not applicable

(3) See below

4.1          Poolingand Servicing Agreement, dated as of August 1, 2017, by and among UBSCommercial Mortgage Securitization Corp., as Depositor, Midland Loan Services,a Division of PNC Bank, National Association, as Master Servicer and as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administratorand as Trustee, and Park Bridge Lender Services LLC, as Operating Advisor andas Asset Representations Reviewer (filed as Exhibit 4.1 to the registrant’sCurrent Report on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.2          Trustand Servicing Agreement, dated as of May 30, 2017, by and among J.P. MorganChase Commercial Mortgage Securities Corp., as Depositor, Wells Fargo Bank,National Association, as Servicer, AEGON USA Realty Advisors, LLC, as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administrator,Wilmington Trust, National Association, as Trustee, and Trimont Real EstateAdvisors, LLC, as Operating Advisor (filed as Exhibit 4.4 to the registrant’sCurrent Report on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.3          Trustand Servicing Agreement, dated as of June 20, 2017, by and among Banc ofAmerica Merrill Lynch Large Loan, Inc., as Depositor, KeyBank NationalAssociation, as Servicer, Cohen Financial, a Division of Truist Bank (f/k/aCohen Financial, a Division of SunTrust Bank), as Special Servicer, Wells FargoBank, National Association, as Certificate Administrator, Wilmington Trust,National Association, as Trustee, and Park Bridge Lender Services LLC, asOperating Advisor (filed as Exhibit 4.2 to the Banc of America Merrill LynchLarge Loan, Inc.’s Current Report on Form 8-K filed on August 31, 2017 underCommission File No. 333-207340-03 and incorporated by reference herein).

4.4          Poolingand Servicing Agreement, dated as of August 1, 2017, by and among UBSCommercial Mortgage Securitization Corp., as Depositor, Midland Loan Services,a Division of PNC Bank, National Association, as Master Servicer and as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administratorand as Trustee, and Park Bridge Lender Services LLC, as Operating Advisor andas Asset Representations Reviewer (filed as Exhibit 4.3 to the registrant’sCurrent Report on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.5          Poolingand Servicing Agreement, dated as of September 1, 2017, by and among CreditSuisse Commercial Mortgage Securities Corp., as Depositor, KeyBank NationalAssociation, as Master Servicer, Rialto Capital Advisors, LLC, as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administratorand as Trustee, and Pentalpha Surveillance LLC, as Operating Advisor and asAsset Representations Reviewer (filed as Exhibit 4.1 to the registrant’sCurrent Report on Form 8-K filed on October 4, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.6          Poolingand Servicing Agreement, dated as of October 1, 2017, by and among UBSCommercial Mortgage Securitization Corp., as Depositor, Wells Fargo Bank,National Association, as Master Servicer, Rialto Capital Advisors, LLC, asSpecial Servicer, AEGON USA Realty Advisors, LLC, as Fairmount at BrewerytownSpecial Servicer, Wells Fargo Bank, National Association, as Certificate Administrator,Wilmington Trust, National Association, as Trustee, and Pentalpha SurveillanceLLC, as Operating Advisor and as Asset Representations Reviewer (filed asExhibit 4.1 to the registrant’s Current Report on Form 8-K filed on October 24,2017 under Commission File No. 333-207340-03 and incorporated by referenceherein).

4.7          Poolingand Servicing Agreement, dated as of October 1, 2017, by and among Banc ofAmerica Merrill Lynch Commercial Mortgage Inc., as Depositor, Wells Fargo Bank,National Association, as Master Servicer, LNR Partners, LLC, as SpecialServicer, Wells Fargo Bank, National Association, as Certificate Administrator,Wilmington Trust, National Association, as Trustee, and Park Bridge LenderServices LLC, as Operating Advisor and Asset Representations Reviewer (filed asExhibit 4.2 to the registrant’s Current Report on Form 8-K filed on October 24,2017 under Commission File No. 333-207340-03 and incorporated by referenceherein).

4.8          Co-LenderAgreement, dated as of May 12, 2017, by and among Bank of America, N.A., asInitial Note 1 Holder, and Barclays Bank PLC, as Initial Note 2 Holder, andSociété Générale, as Initial Note 3 Holder, and Wells Fargo Bank, NationalAssociation, as Initial Note 4 Holder (filed as Exhibit 4.5 to the registrant’sCurrent Report on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.9          AgreementBetween Note Holders, dated as of August 17, 2017, by and between SociétéGénérale, as Initial Note A-1 Holder, and Société Générale, as Initial Note A-2Holder, and Société Générale, as Initial Note A-3 Holder, and Société Générale,as Initial Note A-4 Holder (filed as Exhibit 4.6 to the registrant’s CurrentReport on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.10        AgreementBetween Noteholders, dated as of July 31, 2017, by and among KeyBank NationalAssociation, as Initial Note A-1 Holder, KeyBank National Association, asInitial Note A-2 Holder, and KeyBank National Association, as Initial Note A-3Holder (filed as Exhibit 4.7 to the registrant’s Current Report on Form 8-Kfiled on August 31, 2017 under Commission File No. 333-207340-03 andincorporated by reference herein).

4.11        Co-LenderAgreement, dated as of May 30, 2017, by and among JPMorgan Chase Bank, NationalAssociation, Natixis Real Estate Capital LLC, Société Générale, Deutsche Bank,AG, New York Branch, and Barclays Bank PLC (filed as Exhibit 4.8 to theregistrant’s Current Report on Form 8-K filed on August 31, 2017 underCommission File No. 333-207340-03 and incorporated by reference herein).

4.12        AgreementBetween Noteholders, dated as of April 28, 2017, by and among KeyBank NationalAssociation, as Initial Note A-1 Holder, and KeyBank National Association, asInitial Note A-2 Holder (filed as Exhibit 4.9 to the registrant’s CurrentReport on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.13        AgreementAmong Noteholders, dated as of July 19, 2017, by and among UBS AG, by andthrough its branch office at 1285 Avenue of the Americas, New York, New York,as Initial Note A-1 Holder, Initial Note A-2 Holder, Initial Note A-3 Holder,Initial Note A-4 Holder, Initial Note A-5 Holder, and Initial Note A-6 Holder,and Athene Annuity and Life Company, an Iowa company doing business in New Yorkunder fictitious name MLS, Athene Iowa, as Initial Note B-1 Holder and InitialNote B-2 Holder, and Athene Annuity & Life Assurance Company, a Delawarecompany doing business in New York under fictitious name MLS, Athene Delaware,as Initial Note B-3 Holder (filed as Exhibit 4.10 to the registrant’s CurrentReport on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.14        Co-LenderAgreement, dated as of July 28, 2017, by and between Natixis Real EstateCapital LLC, as Initial Note A-1 Holder, Natixis Real Estate Capital LLC, asInitial Note A-2 Holder, Natixis Real Estate Capital LLC, as Initial Note A-3Holder, Natixis Real Estate Capital LLC, as Initial Note B-1-A Holder, NatixisReal Estate Capital LLC, as Initial Note B-1-B Holder, and Natixis Real EstateCapital LLC, as Initial Note B-2 Holder (filed as Exhibit 4.11 to theregistrant’s Current Report on Form 8-K filed on August 31, 2017 underCommission File No. 333-207340-03 and incorporated by reference herein).

4.15        Co-LenderAgreement, dated as of August 31, 2017, by and between Natixis Real EstateCapital LLC, as Initial Note A-1 Holder, Natixis Real Estate Capital LLC, asInitial Note A-2 Holder, and Natixis Real Estate Capital LLC, as JuniorNoteholder (filed as Exhibit 4.12 to the registrant’s Current Report on Form8-K filed on August 31, 2017 under Commission File No. 333-207340-03 andincorporated by reference herein).

4.16        AgreementBetween Noteholders, dated as of July 25, 2017, by and among KeyBank NationalAssociation, as Initial Note A-1 Holder, and KeyBank National Association, asInitial Note A-2 Holder (filed as Exhibit 4.13 to the registrant’s CurrentReport on Form 8-K filed on August 31, 2017 under Commission File No.333-207340-03 and incorporated by reference herein).

4.17        Co-Lenderand Future Funding Indemnification Agreement, dated as of August 17, 2017,between Natixis Real Estate Capital LLC, as Note A-1 Holder, and Natixis RealEstate Capital LLC, as Note A-2 Holder, and Natixis Real Estate Capital LLC, asNote A-3 Holder, and Natixis Real Estate Capital LLC, as Note A-4 Holder, andNatixis Real Estate Capital LLC, as Future Funding Indemnitor (filed as Exhibit4.14 to the registrant’s Current Report on Form 8-K filed on August 31, 2017under Commission File No. 333-207340-03 and incorporated by reference herein).

4.18        AgreementBetween Note Holders, dated as of August 31, 2017, by and between UBS AG, byand through its branch office at 1285 Avenue of the Americas, New York, NewYork, as Initial Note A-1 Holder, UBS AG, by and through its branch office at1285 Avenue of the Americas, New York, New York, as Initial Note A-2 Holder,UBS AG, by and through its branch office at 1285 Avenue of the Americas, NewYork, New York, as Initial Note A-3 Holder, UBS AG, by and through its branchoffice at 1285 Avenue of the Americas, New York, New York, as Initial Note A-4Holder, and UBS AG, by and through its branch office at 1285 Avenue of theAmericas, New York, New York, as Initial Note A-5 Holder (filed as Exhibit 4.15to the registrant’s Current Report on Form 8-K filed on August 31, 2017 underCommission File No. 333-207340-03 and incorporated by reference herein).

4.19        PrimaryServicing Agreement, Dated as of August 1, 2017, by and between Midland LoanServices, a Division of PNC Bank, National Association and KeyBank NationalAssociation (filed as Exhibit 4.16 to the registrant’s Current Report on Form 8-Kfiled on August 31, 2017 under Commission File No. 333-207340-03 andincorporated by reference herein).

31           Rule 13a-14(d)/15d-14(d)Certifications.

33           Reports on assessment of compliance with servicing criteria for asset-backedsecurities.

33.1        Midland Loan Services, aDivision of PNC Bank, National Association, as Master Servicer

33.2        Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer (see Exhibit33.1)

33.3        Wells Fargo Bank, NationalAssociation, as Trustee and Certificate Administrator

33.4        Wells Fargo Bank, NationalAssociation, as Custodian

33.5        Park Bridge LenderServices LLC, as Operating Advisor

33.6        KeyBank NationalAssociation, as Primary Servicer

33.7        Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the GreatValley Commerce Center Mortgage Loan (see Exhibit 33.1)

33.8        Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the GreatValley Commerce Center Mortgage Loan (see Exhibit 33.1)

33.9        Wells Fargo Bank, National Association, as Trustee of the Great Valley CommerceCenter Mortgage Loan (Omitted. See Explanatory Notes.)

33.10      Wells Fargo Bank, NationalAssociation, as Custodian of the Great Valley Commerce Center Mortgage Loan(see Exhibit 33.4)

33.11      Park Bridge LenderServices LLC, as Operating Advisor of the Great Valley Commerce Center MortgageLoan (see Exhibit 33.5)

33.12      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the ICLeased Fee Hotel Portfolio Mortgage Loan (see Exhibit 33.1)

33.13      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the ICLeased Fee Hotel Portfolio Mortgage Loan (see Exhibit 33.1)

33.14      Wells Fargo Bank, National Association, as Trustee of the IC Leased Fee HotelPortfolio Mortgage Loan (Omitted. See Explanatory Notes.)

33.15      Wells Fargo Bank, NationalAssociation, as Custodian of the IC Leased Fee Hotel Portfolio Mortgage Loan(see Exhibit 33.4)

33.16      Park Bridge LenderServices LLC, as Operating Advisor of the IC Leased Fee Hotel PortfolioMortgage Loan (see Exhibit 33.5)

33.17      Wells Fargo Bank,National Association, as Primary Servicer of the 245 Park Avenue Mortgage Loan

33.18      AEGON USA RealtyAdvisors, LLC, as Special Servicer of the 245 Park Avenue Mortgage Loan

33.19      Wilmington Trust, National Association, as Trustee of the 245 Park AvenueMortgage Loan (Omitted. See Explanatory Notes.)

33.20      Wells Fargo Bank, NationalAssociation, as Custodian of the 245 Park Avenue Mortgage Loan (see Exhibit33.4)

33.21      Trimont Real EstateAdvisors, LLC, as Operating Advisor of the 245 Park Avenue Mortgage Loan

33.22      CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the 245 Park AvenueMortgage Loan

33.23      National Tax Search, LLC,as Servicing Function Participant of the 245 Park Avenue Mortgage Loan

33.24      KeyBank NationalAssociation, as Primary Servicer of the Del Amo Fashion Center Mortgage Loan(see Exhibit 33.6)

33.25      Cohen Financial, aDivision of Truist Bank (f/k/a Cohen Financial, a Division of SunTrust Bank),as Special Servicer of the Del Amo Fashion Center Mortgage Loan

33.26      Wilmington Trust, National Association, as Trustee of the Del Amo FashionCenter Mortgage Loan (Omitted. See Explanatory Notes.)

33.27      Wells Fargo Bank, NationalAssociation, as Custodian of the Del Amo Fashion Center Mortgage Loan (seeExhibit 33.4)

33.28      Park Bridge LenderServices LLC, as Operating Advisor of the Del Amo Fashion Center Mortgage Loan(see Exhibit 33.5)

33.29      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 33.1)

33.30      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 33.1)

33.31      Wells Fargo Bank, National Association, as Trustee of the TZA MultifamilyPortfolio I Mortgage Loan (Omitted. See Explanatory Notes.)

33.32      Wells Fargo Bank, NationalAssociation, as Custodian of the TZA Multifamily Portfolio I Mortgage Loan (seeExhibit 33.4)

33.33      Park Bridge LenderServices LLC, as Operating Advisor of the TZA Multifamily Portfolio I MortgageLoan (see Exhibit 33.5)

33.34      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the ParkWest Village Mortgage Loan (see Exhibit 33.1)

33.35      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the ParkWest Village Mortgage Loan (see Exhibit 33.1)

33.36      Wells Fargo Bank, National Association, as Trustee of the Park West VillageMortgage Loan (Omitted. See Explanatory Notes.)

33.37      Wells Fargo Bank, NationalAssociation, as Custodian of the Park West Village Mortgage Loan (see Exhibit33.4)

33.38      Park Bridge LenderServices LLC, as Operating Advisor of the Park West Village Mortgage Loan (seeExhibit 33.5)

33.39      KeyBank NationalAssociation, as Primary Servicer of the JW Marriott Chicago Mortgage Loan (seeExhibit 33.6)

33.40      Rialto Capital Advisors,LLC, as Special Servicer of the JW Marriott Chicago Mortgage Loan

33.41      Wells Fargo Bank, National Association, as Trustee of the JW Marriott ChicagoMortgage Loan (Omitted. See Explanatory Notes.)

33.42      Wells Fargo Bank, NationalAssociation, as Custodian of the JW Marriott Chicago Mortgage Loan (see Exhibit33.4)

33.43      Pentalpha SurveillanceLLC, as Operating Advisor of the JW Marriott Chicago Mortgage Loan

33.44      KeyBank NationalAssociation, as Primary Servicer of the Center 78 Mortgage Loan (see Exhibit33.6)

33.45      Rialto Capital Advisors,LLC, as Special Servicer of the Center 78 Mortgage Loan (see Exhibit 33.40)

33.46      Wells Fargo Bank, National Association, as Trustee of the Center 78 MortgageLoan (Omitted. See Explanatory Notes.)

33.47      Wells Fargo Bank, NationalAssociation, as Custodian of the Center 78 Mortgage Loan (see Exhibit 33.4)

33.48      Pentalpha SurveillanceLLC, as Operating Advisor of the Center 78 Mortgage Loan (see Exhibit 33.43)

33.49      Wells Fargo Bank,National Association, as Primary Servicer of The District Mortgage Loan (seeExhibit 33.17)

33.50      Rialto Capital Advisors,LLC, as Special Servicer of The District Mortgage Loan (see Exhibit 33.40)

33.51      Wilmington Trust, National Association, as Trustee of The District MortgageLoan (Omitted. See Explanatory Notes.)

33.52      Wells Fargo Bank, NationalAssociation, as Custodian of The District Mortgage Loan (see Exhibit 33.4)

33.53      Pentalpha SurveillanceLLC, as Operating Advisor of The District Mortgage Loan (see Exhibit 33.43)

33.54      CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of The DistrictMortgage Loan (see Exhibit 33.22)

33.55      National Tax Search, LLC,as Servicing Function Participant of The District Mortgage Loan (see Exhibit33.23)

33.56      KeyBank NationalAssociation, as Primary Servicer of the American Cancer Society Center MortgageLoan (see Exhibit 33.6)

33.57      LNR Partners, LLC, asSpecial Servicer of the American Cancer Society Center Mortgage Loan

33.58      Wilmington Trust, National Association, as Trustee of the American CancerSociety Center Mortgage Loan (Omitted. See Explanatory Notes.)

33.59      Wells Fargo Bank, NationalAssociation, as Custodian of the American Cancer Society Center Mortgage Loan(see Exhibit 33.4)

33.60      Park Bridge LenderServices LLC, as Operating Advisor of the American Cancer Society CenterMortgage Loan (see Exhibit 33.5)

33.61      KeyBank NationalAssociation, as Primary Servicer of the OKC Outlets Mortgage Loan (see Exhibit33.6)

33.62      LNR Partners, LLC, asSpecial Servicer of the OKC Outlets Mortgage Loan (see Exhibit 33.57)

33.63      Wilmington Trust, National Association, as Trustee of the OKC Outlets MortgageLoan (Omitted. See Explanatory Notes.)

33.64      Wells Fargo Bank, NationalAssociation, as Custodian of the OKC Outlets Mortgage Loan (see Exhibit 33.4)

33.65      Park Bridge Lender ServicesLLC, as Operating Advisor of the OKC Outlets Mortgage Loan (see Exhibit 33.5)

34           Attestationreports on assessment of compliance with servicing criteria for asset-backedsecurities.

34.1        Midland Loan Services, aDivision of PNC Bank, National Association, as Master Servicer

34.2        Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer (see Exhibit34.1)

34.3        Wells Fargo Bank, NationalAssociation, as Trustee and Certificate Administrator

34.4        Wells Fargo Bank, NationalAssociation, as Custodian

34.5        Park Bridge LenderServices LLC, as Operating Advisor

34.6        KeyBank NationalAssociation, as Primary Servicer

34.7        Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the GreatValley Commerce Center Mortgage Loan (see Exhibit 34.1)

34.8        Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the GreatValley Commerce Center Mortgage Loan (see Exhibit 34.1)

34.9        Wells Fargo Bank, National Association, as Trustee of the Great Valley CommerceCenter Mortgage Loan (Omitted. See Explanatory Notes.)

34.10      Wells Fargo Bank, NationalAssociation, as Custodian of the Great Valley Commerce Center Mortgage Loan(see Exhibit 34.4)

34.11      Park Bridge LenderServices LLC, as Operating Advisor of the Great Valley Commerce Center MortgageLoan (see Exhibit 34.5)

34.12      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the ICLeased Fee Hotel Portfolio Mortgage Loan (see Exhibit 34.1)

34.13      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the ICLeased Fee Hotel Portfolio Mortgage Loan (see Exhibit 34.1)

34.14      Wells Fargo Bank, National Association, as Trustee of the IC Leased Fee HotelPortfolio Mortgage Loan (Omitted. See Explanatory Notes.)

34.15      Wells Fargo Bank, NationalAssociation, as Custodian of the IC Leased Fee Hotel Portfolio Mortgage Loan(see Exhibit 34.4)

34.16      Park Bridge LenderServices LLC, as Operating Advisor of the IC Leased Fee Hotel PortfolioMortgage Loan (see Exhibit 34.5)

34.17      Wells Fargo Bank,National Association, as Primary Servicer of the 245 Park Avenue Mortgage Loan

34.18      AEGON USA RealtyAdvisors, LLC, as Special Servicer of the 245 Park Avenue Mortgage Loan

34.19      Wilmington Trust, National Association, as Trustee of the 245 Park AvenueMortgage Loan (Omitted. See Explanatory Notes.)

34.20      Wells Fargo Bank, NationalAssociation, as Custodian of the 245 Park Avenue Mortgage Loan (see Exhibit34.4)

34.21      Trimont Real EstateAdvisors, LLC, as Operating Advisor of the 245 Park Avenue Mortgage Loan

34.22      CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of the 245 Park AvenueMortgage Loan

34.23      National Tax Search, LLC,as Servicing Function Participant of the 245 Park Avenue Mortgage Loan

34.24      KeyBank NationalAssociation, as Primary Servicer of the Del Amo Fashion Center Mortgage Loan(see Exhibit 34.6)

34.25      Cohen Financial, aDivision of Truist Bank (f/k/a Cohen Financial, a Division of SunTrust Bank),as Special Servicer of the Del Amo Fashion Center Mortgage Loan

34.26      Wilmington Trust, National Association, as Trustee of the Del Amo FashionCenter Mortgage Loan (Omitted. See Explanatory Notes.)

34.27      Wells Fargo Bank, NationalAssociation, as Custodian of the Del Amo Fashion Center Mortgage Loan (seeExhibit 34.4)

34.28      Park Bridge LenderServices LLC, as Operating Advisor of the Del Amo Fashion Center Mortgage Loan(see Exhibit 34.5)

34.29      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 34.1)

34.30      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 34.1)

34.31      Wells Fargo Bank, National Association, as Trustee of the TZA MultifamilyPortfolio I Mortgage Loan (Omitted. See Explanatory Notes.)

34.32      Wells Fargo Bank, NationalAssociation, as Custodian of the TZA Multifamily Portfolio I Mortgage Loan (seeExhibit 34.4)

34.33      Park Bridge LenderServices LLC, as Operating Advisor of the TZA Multifamily Portfolio I MortgageLoan (see Exhibit 34.5)

34.34      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the ParkWest Village Mortgage Loan (see Exhibit 34.1)

34.35      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the ParkWest Village Mortgage Loan (see Exhibit 34.1)

34.36      Wells Fargo Bank, National Association, as Trustee of the Park West VillageMortgage Loan (Omitted. See Explanatory Notes.)

34.37      Wells Fargo Bank, NationalAssociation, as Custodian of the Park West Village Mortgage Loan (see Exhibit34.4)

34.38      Park Bridge LenderServices LLC, as Operating Advisor of the Park West Village Mortgage Loan (seeExhibit 34.5)

34.39      KeyBank NationalAssociation, as Primary Servicer of the JW Marriott Chicago Mortgage Loan (seeExhibit 34.6)

34.40      Rialto Capital Advisors,LLC, as Special Servicer of the JW Marriott Chicago Mortgage Loan

34.41      Wells Fargo Bank, National Association, as Trustee of the JW Marriott ChicagoMortgage Loan (Omitted. See Explanatory Notes.)

34.42      Wells Fargo Bank, NationalAssociation, as Custodian of the JW Marriott Chicago Mortgage Loan (see Exhibit34.4)

34.43      Pentalpha SurveillanceLLC, as Operating Advisor of the JW Marriott Chicago Mortgage Loan

34.44      KeyBank NationalAssociation, as Primary Servicer of the Center 78 Mortgage Loan (see Exhibit34.6)

34.45      Rialto Capital Advisors,LLC, as Special Servicer of the Center 78 Mortgage Loan (see Exhibit 34.40)

34.46      Wells Fargo Bank, National Association, as Trustee of the Center 78 MortgageLoan (Omitted. See Explanatory Notes.)

34.47      Wells Fargo Bank, NationalAssociation, as Custodian of the Center 78 Mortgage Loan (see Exhibit 34.4)

34.48      Pentalpha SurveillanceLLC, as Operating Advisor of the Center 78 Mortgage Loan (see Exhibit 34.43)

34.49      Wells Fargo Bank,National Association, as Primary Servicer of The District Mortgage Loan (seeExhibit 34.17)

34.50      Rialto Capital Advisors,LLC, as Special Servicer of The District Mortgage Loan (see Exhibit 34.40)

34.51      Wilmington Trust, National Association, as Trustee of The District MortgageLoan (Omitted. See Explanatory Notes.)

34.52      Wells Fargo Bank, NationalAssociation, as Custodian of The District Mortgage Loan (see Exhibit 34.4)

34.53      Pentalpha SurveillanceLLC, as Operating Advisor of The District Mortgage Loan (see Exhibit 34.43)

34.54      CoreLogic Commercial RealEstate Services, Inc., as Servicing Function Participant of The DistrictMortgage Loan (see Exhibit 34.22)

34.55      National Tax Search, LLC,as Servicing Function Participant of The District Mortgage Loan (see Exhibit34.23)

34.56      KeyBank NationalAssociation, as Primary Servicer of the American Cancer Society Center MortgageLoan (see Exhibit 34.6)

34.57      LNR Partners, LLC, asSpecial Servicer of the American Cancer Society Center Mortgage Loan

34.58      Wilmington Trust, National Association, as Trustee of the American CancerSociety Center Mortgage Loan (Omitted. See Explanatory Notes.)

34.59      Wells Fargo Bank, NationalAssociation, as Custodian of the American Cancer Society Center Mortgage Loan(see Exhibit 34.4)

34.60      Park Bridge LenderServices LLC, as Operating Advisor of the American Cancer Society CenterMortgage Loan (see Exhibit 34.5)

34.61      KeyBank NationalAssociation, as Primary Servicer of the OKC Outlets Mortgage Loan (see Exhibit34.6)

34.62      LNR Partners, LLC, asSpecial Servicer of the OKC Outlets Mortgage Loan (see Exhibit 34.57)

34.63      Wilmington Trust, National Association, as Trustee of the OKC Outlets MortgageLoan (Omitted. See Explanatory Notes.)

34.64      Wells Fargo Bank, NationalAssociation, as Custodian of the OKC Outlets Mortgage Loan (see Exhibit 34.4)

34.65      Park Bridge LenderServices LLC, as Operating Advisor of the OKC Outlets Mortgage Loan (seeExhibit 34.5)

35           Servicer compliance statements.

35.1        Midland Loan Services, aDivision of PNC Bank, National Association, as Master Servicer

35.2        Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer (see Exhibit35.1)

35.3        Wells Fargo Bank, NationalAssociation, as Certificate Administrator

35.4        KeyBank NationalAssociation, as Primary Servicer

35.5        Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the GreatValley Commerce Center Mortgage Loan (see Exhibit 35.1)

35.6        Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the GreatValley Commerce Center Mortgage Loan (see Exhibit 35.1)

35.7        Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the ICLeased Fee Hotel Portfolio Mortgage Loan (see Exhibit 35.1)

35.8        Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the IC LeasedFee Hotel Portfolio Mortgage Loan (see Exhibit 35.1)

35.9        Wells Fargo Bank, NationalAssociation, as Primary Servicer of the 245 Park Avenue Mortgage Loan

35.10      AEGON USA Realty Advisors, LLC, as Special Servicer of the 245 Park AvenueMortgage Loan (Omitted. See Explanatory Notes.)

35.11      KeyBank NationalAssociation, as Primary Servicer of the Del Amo Fashion Center Mortgage Loan(see Exhibit 35.4)

35.12      Cohen Financial, a Division of Truist Bank (f/k/a Cohen Financial, a Divisionof SunTrust Bank), as Special Servicer of the Del Amo Fashion Center MortgageLoan (Omitted. See Explanatory Notes.)

35.13      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 35.1)

35.14      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the TZAMultifamily Portfolio I Mortgage Loan (see Exhibit 35.1)

35.15      Midland Loan Services, aDivision of PNC Bank, National Association, as Primary Servicer of the ParkWest Village Mortgage Loan (see Exhibit 35.1)

35.16      Midland Loan Services, aDivision of PNC Bank, National Association, as Special Servicer of the ParkWest Village Mortgage Loan (see Exhibit 35.1)

35.17      KeyBank NationalAssociation, as Primary Servicer of the JW Marriott Chicago Mortgage Loan (seeExhibit 35.4)

35.18      Rialto Capital Advisors,LLC, as Special Servicer of the JW Marriott Chicago Mortgage Loan

35.19      KeyBank NationalAssociation, as Primary Servicer of the Center 78 Mortgage Loan (see Exhibit35.4)

35.20      Rialto Capital Advisors,LLC, as Special Servicer of the Center 78 Mortgage Loan (see Exhibit 35.18)

35.21      Wells Fargo Bank, NationalAssociation, as Primary Servicer of The District Mortgage Loan (see Exhibit35.9)

35.22      Rialto Capital Advisors,LLC, as Special Servicer of The District Mortgage Loan (see Exhibit 35.18)

35.23      KeyBank NationalAssociation, as Primary Servicer of the American Cancer Society Center MortgageLoan (see Exhibit 35.4)

35.24      LNR Partners, LLC, asSpecial Servicer of the American Cancer Society Center Mortgage Loan

35.25      KeyBank NationalAssociation, as Primary Servicer of the OKC Outlets Mortgage Loan (see Exhibit35.4)

35.26      LNR Partners, LLC, asSpecial Servicer of the OKC Outlets Mortgage Loan (see Exhibit 35.24)

99.1        MortgageLoan Purchase Agreement, dated as of August 17, 2017, between UBS AG, by andthrough its New York branch office at 1285 Avenue of the Americas, New York,New York and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit99.3 to the registrant’s Current Report on Form 8-K filed on August 31, 2017under Commission File No. 333-207340-03  and incorporated by referenceherein)

99.2        MortgageLoan Purchase Agreement, dated as of August 17, 2017, between Société Généraleand UBS Commercial Mortgage Securitization Corp. (filed as Exhibit 99.2 to theregistrant’s Current Report on Form 8-K filed on August 31, 2017 underCommission File No. 333-207340-03  and incorporated by reference herein)

99.3        MortgageLoan Purchase Agreement, dated as of August 17, 2017, between KeyBank NationalAssociation and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit99.1 to the registrant’s Current Report on Form 8-K filed on August 31, 2017under Commission File No. 333-207340-03 and incorporated by reference herein)

99.4        MortgageLoan Purchase Agreement, dated as of August 17, 2017, between Natixis Real EstateCapital LLC and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit99.4 to the registrant’s Current Report on Form 8-K filed on August 31, 2017under Commission File No. 333-207340-03  and incorporated by referenceherein)

99.5        MortgageLoan Purchase Agreement, dated as of August 17, 2017, between Rialto MortgageFinance, LLC and UBS Commercial Mortgage Securitization Corp. (filed as Exhibit99.5 to the registrant’s Current Report on Form 8-K filed on August 31, 2017under Commission File No. 333-207340-03  and incorporated by referenceherein)

(b)   The exhibits required to be filed by theRegistrant pursuant to Item 601 of Regulation S-K are listed above.

(c)    Not Applicable.

 

**SIGNATURES**

Pursuant to the requirements ofSection 13 or 15(d) of the Securities Exchange Act of 1934, the registrant hasduly caused this report to be signed on its behalf by the undersigned,thereunto duly authorized.

UBS Commercial MortgageSecuritization Corp.(Depositor)

/s/Nicholas Galeone

NicholasGaleone, President

(senior officer in charge ofsecuritization of the depositor)

Date: March 19, 2020

/s/ DavidSchell

DavidSchell, Managing Director

Date: March 19, 2020