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





I, Leland F. Bunch,
III, 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 Morgan Stanley Bank of
America Merrill Lynch Trust 2017-C34 (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, LNR Partners, 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, Park Bridge Lender Services 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, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the
Starwood Capital Hotel Portfolio Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the
Starwood Capital Hotel Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee and Certificate Administrator for the Starwood Capital
Hotel Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as
Custodian for the Starwood Capital Hotel Portfolio Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the Starwood Capital Hotel Portfolio
Mortgage Loan, Wells Fargo Bank, National Association, as Primary Servicer for
the 237 Park Avenue Mortgage Loan, Wells Fargo Bank, National Association, as
Special Servicer for the 237 Park Avenue Mortgage Loan, Wilmington Trust,
National Association, as Trustee for the 237 Park Avenue Mortgage Loan, Wells
Fargo Bank, National Association, as Certificate Administrator for the 237 Park
Avenue Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for
the 237 Park Avenue Mortgage Loan, Park Bridge Lender Services LLC, as
Operating Advisor for the 237 Park Avenue Mortgage Loan, CoreLogic Commercial
Real Estate Services, Inc., as Servicing Function Participant for the 237 Park
Avenue Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the 237 Park Avenue Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Primary Servicer for the Great
Valley Commerce Center Mortgage Loan, Midland Loan Services, a Division of PNC
Bank, National Association, as Special Servicer for the Great Valley Commerce
Center Mortgage Loan, Wells Fargo Bank, National Association, as Trustee and
Certificate Administrator for the Great Valley Commerce Center Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the Great Valley
Commerce Center Mortgage Loan, Park Bridge Lender Services LLC, as Operating
Advisor for the Great Valley Commerce Center Mortgage Loan, Wells Fargo Bank,
National Association, as Primary Servicer for the 222 Second Street Mortgage
Loan, Rialto Capital Advisors, LLC, as Special Servicer for the 222 Second
Street Mortgage Loan, Wilmington Trust, National Association, as Trustee for
the 222 Second Street Mortgage Loan, Wells Fargo Bank, National Association, as
Certificate Administrator for the 222 Second Street Mortgage Loan, Wells Fargo
Bank, National Association, as Custodian for the 222 Second Street Mortgage
Loan, Pentalpha Surveillance LLC, as Operating Advisor for the 222 Second Street
Mortgage Loan, CoreLogic Commercial Real Estate Services, Inc., as Servicing
Function Participant for the 222 Second Street Mortgage Loan, National Tax
Search, LLC, as Servicing Function Participant for the 222 Second Street
Mortgage Loan, Wells Fargo Bank, National Association, as Primary Servicer for
the Mall of Louisiana Mortgage Loan, Rialto Capital Advisors, LLC, as Special
Servicer for the Mall of Louisiana Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the Mall of Louisiana Mortgage Loan, Wells Fargo
Bank, National Association, as Certificate Administrator for the Mall of
Louisiana Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the Mall of Louisiana Mortgage Loan, Pentalpha Surveillance LLC, as Operating
Advisor for the Mall of Louisiana Mortgage Loan, CoreLogic Commercial Real
Estate Services, Inc., as Servicing Function Participant for the Mall of
Louisiana Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the Mall of Louisiana Mortgage Loan, Wells Fargo Bank, National
Association, as Primary Servicer for the 9-19 9th Avenue Mortgage Loan, KeyBank
National Association, as Special Servicer for the 9-19 9th Avenue Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the 9-19 9th
Avenue Mortgage Loan, Citibank, N.A., as Certificate Administrator for the 9-19
9th Avenue Mortgage Loan, Citibank, N.A., as Custodian for the 9-19 9th Avenue
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the 9-19 9th
Avenue Mortgage Loan, CoreLogic Commercial Real Estate Services, Inc., as
Servicing Function Participant for the 9-19 9th Avenue Mortgage Loan, and
National Tax Search, LLC, as Servicing Function Participant for the 9-19 9th
Avenue Mortgage Loan, Wells Fargo Bank, National Association, as Primary
Servicer for the Corporate Woods Portfolio Mortgage Loan, KeyBank National
Association, as Special Servicer for the Corporate Woods Portfolio Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the Corporate
Woods Portfolio Mortgage Loan, Citibank, N.A., as Certificate Administrator for
the Corporate Woods Portfolio Mortgage Loan, Citibank, N.A., as Custodian for
the Corporate Woods Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as
Operating Advisor for the Corporate Woods Portfolio Mortgage Loan, CoreLogic
Commercial Real Estate Services, Inc., as Servicing Function Participant for
the Corporate Woods Portfolio Mortgage Loan, National Tax Search, LLC, as
Servicing Function Participant for the Corporate Woods Portfolio Mortgage Loan,
Wells Fargo Bank, National Association, as Primary Servicer for the Visions
Hotel Portfolio Mortgage Loan, KeyBank National Association, as Special
Servicer for the Visions Hotel Portfolio Mortgage Loan, Wilmington Trust,
National Association, as Trustee for the Visions Hotel Portfolio Mortgage Loan,
Citibank, N.A., as Certificate Administrator for the Visions Hotel Portfolio
Mortgage Loan, Citibank, N.A., as Custodian for the Visions Hotel Portfolio
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the Visions
Hotel Portfolio Mortgage Loan, and CoreLogic Commercial Real Estate Services,
Inc., as Servicing Function Participant for the Visions Hotel Portfolio
Mortgage Loan, and National Tax Search, LLC, as Servicing Function Participant
for the Visions Hotel Portfolio Mortgage Loan.







Dated: March 22, 2019





/s/ Leland F. Bunch,
III





President and Chief
Executive Officer

(senior
officer in charge of securitization of the depositor)