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





I, Nicolas Galeone,
certify that:



1. I have reviewed
this report on Form 10-K and all reports on Form 10-D required to be filed in
respect of the period covered by this report on Form 10-K of the UBS Commercial
Mortgage Trust 2017-C6 (the "Exchange Act periodic reports");



2. Based on my
knowledge, the Exchange Act periodic reports, taken as a whole, do not contain
any untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period
covered by this report;



3. Based on my
knowledge, all of the distribution, servicing and other information required to
be provided under Form 10-D for the period covered by this report is included
in the Exchange Act periodic reports;



4. Based on my
knowledge and the servicer compliance statements required in this report under
Item 1123 of Regulation AB, and except as disclosed in the Exchange Act
periodic reports, the servicers have fulfilled their obligations under the
servicing agreements in all material respects; and



5. All of the reports
on assessment of compliance with servicing criteria for asset-backed securities
and their related attestation reports on assessment of compliance with
servicing criteria for asset-backed securities required to be included in this
report in accordance with Item 1122 of Regulation AB and Exchange Act Rules
13a-18 and 15d-18 have been included as an exhibit to this report, except as
otherwise disclosed in this report. Any material instances of noncompliance
described in such reports have been disclosed in this report on Form 10-K.



In giving the
certifications above, I have reasonably relied on information provided to me by
the following unaffiliated parties:



Wells Fargo Bank,
National Association, as Master Servicer, Rialto Capital Advisors, LLC, as
Special Servicer, Wilmington Trust, National Association, as Trustee, Wells
Fargo Bank, National Association, as Certificate Administrator, Wells Fargo
Bank, National Association, as Custodian, Pentalpha Surveillance LLC, as
Operating Advisor, CoreLogic Commercial Real Estate Services, Inc., as
Servicing Function Participant, National Tax Search, LLC, as Servicing Function
Participant, KeyBank National Association, as Primary Servicer, Berkeley Point
Capital LLC, as Primary Servicer, Wells Fargo Bank, National Association, as Primary
Servicer for the Meridian Sunrise Village Mortgage Loan, Rialto Capital
Advisors, LLC, as Special Servicer for the Meridian Sunrise Village Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the Meridian
Sunrise Village Mortgage Loan, Wells Fargo Bank, National Association, as
Certificate Administrator for the Meridian Sunrise Village Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the Meridian Sunrise Village
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the
Meridian Sunrise Village Mortgage Loan, CoreLogic Commercial Real Estate
Services, Inc., as Servicing Function Participant for the Meridian Sunrise
Village Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the Meridian Sunrise Village Mortgage Loan, Wells Fargo Bank,
National Association, as Primary Servicer for the Burbank Office Portfolio
Mortgage Loan, AEGON USA Realty Advisors, LLC, as Special Servicer for the
Burbank Office Portfolio Mortgage Loan, Wilmington Trust, National Association,
as Trustee for the Burbank Office Portfolio Mortgage Loan, Wells Fargo Bank,
National Association, as Certificate Administrator for the Burbank Office
Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the Burbank Office Portfolio Mortgage Loan, Park Bridge Lender Services
LLC, as Operating Advisor for the Burbank Office Portfolio Mortgage Loan,
CoreLogic Commercial Real Estate Services, Inc., as Servicing Function
Participant for the Burbank Office Portfolio Mortgage Loan, National Tax
Search, LLC, as Servicing Function Participant for the Burbank Office Portfolio
Mortgage Loan, Wells Fargo Bank, National Association, as Primary Servicer for
the Griffin Portfolio Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Special Servicer for the Griffin Portfolio
Mortgage Loan, Wilmington Trust, National Association, as Trustee for the
Griffin Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Certificate
Administrator for the Griffin Portfolio Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the Griffin Portfolio Mortgage Loan,
Park Bridge Lender Services LLC, as Operating Advisor for the Griffin Portfolio
Mortgage Loan, CoreLogic Commercial Real Estate Services, Inc., as Servicing
Function Participant for the Griffin Portfolio Mortgage Loan, National Tax
Search, LLC, as Servicing Function Participant for the Griffin Portfolio
Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Primary Servicer for the DoubleTree Wilmington Mortgage Loan,
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer for the DoubleTree Wilmington Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee and Certificate Administrator for the DoubleTree
Wilmington Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the DoubleTree Wilmington Mortgage Loan, Park Bridge Lender Services LLC,
as Operating Advisor for the DoubleTree Wilmington Mortgage Loan, KeyBank
National Association, as Primary Servicer for the Yorkshire & Lexington
Towers Mortgage Loan, CWCapital Asset Management LLC, as Special Servicer for
the Yorkshire & Lexington Towers Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee and Certificate Administrator for the Yorkshire &
Lexington Towers Mortgage Loan, Wells Fargo Bank, National Association, as
Custodian for the Yorkshire & Lexington Towers Mortgage Loan, Park Bridge Lender
Services LLC, as Operating Advisor for the Yorkshire & Lexington Towers
Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National
Association, as Primary Servicer for the 2U Headquarters Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Special
Servicer for the 2U Headquarters Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee and Certificate Administrator for the 2U Headquarters
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the 2U
Headquarters Mortgage Loan, Park Bridge Lender Services LLC, as Operating
Advisor for the 2U Headquarters Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the Chelsea
Multifamily Portfolio Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Special Servicer for the Chelsea Multifamily
Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Trustee and
Certificate Administrator for the Chelsea Multifamily Portfolio Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the Chelsea
Multifamily Portfolio Mortgage Loan, Park Bridge Lender Services LLC, as
Operating Advisor for the Chelsea Multifamily Portfolio Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the At Home Portfolio Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the At Home
Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Trustee and
Certificate Administrator for the At Home Portfolio Mortgage Loan, Wells Fargo
Bank, National Association, as Custodian for the At Home Portfolio Mortgage
Loan, Park Bridge Lender Services LLC, as Operating Advisor for the At Home
Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Primary
Servicer for the Bass Pro & Cabela's Portfolio Mortgage Loan, Midland Loan
Services, a Division of PNC Bank, National Association, as Special Servicer for
the Bass Pro & Cabela's Portfolio Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the Bass Pro & Cabela's Portfolio Mortgage
Loan, Wells Fargo Bank, National Association, as Certificate Administrator for
the Bass Pro & Cabela's Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Bass Pro & Cabela's Portfolio Mortgage
Loan, Pentalpha Surveillance LLC, as Operating Advisor for the Bass Pro &
Cabela's Portfolio Mortgage Loan, CoreLogic Commercial Real Estate Services,
Inc., as Servicing Function Participant for the Bass Pro & Cabela's
Portfolio Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the Bass Pro & Cabela's Portfolio Mortgage Loan, Wells
Fargo Bank, National Association, as Primary Servicer for the Logan Town Center
Mortgage Loan, LNR Partners, LLC, as Special Servicer for the Logan Town Center
Mortgage Loan, Wilmington Trust, National Association, as Trustee for the Logan
Town Center Mortgage Loan, Wells Fargo Bank, National Association, as
Certificate Administrator for the Logan Town Center Mortgage Loan, Wells Fargo
Bank, National Association, as Custodian for the Logan Town Center Mortgage
Loan, Park Bridge Lender Services LLC, as Operating Advisor for the Logan Town
Center Mortgage Loan, CoreLogic Commercial Real Estate Services, Inc., as
Servicing Function Participant for the Logan Town Center Mortgage Loan,
National Tax Search, LLC, as Servicing Function Participant for the Logan Town
Center Mortgage Loan, Wells Fargo Bank, National Association, as Primary
Servicer for the National Office Portfolio Mortgage Loan, KeyBank National
Association, as Special Servicer for the National Office Portfolio Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the National
Office Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as
Certificate Administrator for the National Office Portfolio Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the National Office
Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for
the National Office Portfolio Mortgage Loan, CoreLogic Commercial Real Estate
Services, Inc., as Servicing Function Participant for the National Office
Portfolio Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the National Office Portfolio Mortgage Loan, Wells Fargo Bank,
National Association, as Primary Servicer for the HRC Hotels Portfolio Mortgage
Loan, KeyBank National Association, as Special Servicer for the HRC Hotels
Portfolio Mortgage Loan, Wilmington Trust, National Association, as Trustee for
the HRC Hotels Portfolio Mortgage Loan, Wells Fargo Bank, National Association,
as Certificate Administrator for the HRC Hotels Portfolio Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the HRC Hotels Portfolio
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the HRC
Hotels Portfolio Mortgage Loan, CoreLogic Commercial Real Estate Services,
Inc., as Servicing Function Participant for the HRC Hotels Portfolio Mortgage
Loan, National Tax Search, LLC, as Servicing Function Participant for the HRC
Hotels Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as
Primary Servicer for the Marketplace at Four Corners Mortgage Loan, KeyBank
National Association, as Special Servicer for the Marketplace at Four Corners
Mortgage Loan, Wilmington Trust, National Association, as Trustee for the
Marketplace at Four Corners Mortgage Loan, Wells Fargo Bank, National
Association, as Certificate Administrator for the Marketplace at Four Corners
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the
Marketplace at Four Corners Mortgage Loan, Pentalpha Surveillance LLC, as
Operating Advisor for the Marketplace at Four Corners Mortgage Loan, CoreLogic
Commercial Real Estate Services, Inc., as Servicing Function Participant for
the Marketplace at Four Corners Mortgage Loan, National Tax Search, LLC, as
Servicing Function Participant for the Marketplace at Four Corners Mortgage
Loan, Wells Fargo Bank, National Association, as Primary Servicer for the
Belden Park Crossing Mortgage Loan, KeyBank National Association, as Special
Servicer for the Belden Park Crossing Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the Belden Park Crossing Mortgage Loan, Wells Fargo
Bank, National Association, as Certificate Administrator for the Belden Park
Crossing Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the Belden Park Crossing Mortgage Loan, Pentalpha Surveillance LLC, as
Operating Advisor for the Belden Park Crossing Mortgage Loan, CoreLogic
Commercial Real Estate Services, Inc., as Servicing Function Participant for
the Belden Park Crossing Mortgage Loan, and National Tax Search, LLC, as
Servicing Function Participant for the Belden Park Crossing Mortgage Loan.







Dated: September 19,
2018





/s/ Nicolas Galeone





President

(senior
officer in charge of securitization of the depositor)