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


I, Helaine M. Kaplan, 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 COMM 2012-CCRE3 Mortgage Trust(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, Midland Loan
Services, a Division of PNC Bank, National Association, as Special Servicer,
U.S. Bank National Association, as Trustee, Situs Holdings, LLC, as
Operating Advisor, CoreLogic Commercial Real Estate Services, Inc., as
Servicing Function Participant, National Tax Search, LLC, as Servicing
Function Participant, Wells Fargo Bank, National Association, as Primary
Servicer for the Crossgates Mall Mortgage Loan, Midland Loan Services, a
Division of PNC Bank, National Association, as Special Servicer for the
Crossgates Mall Mortgage Loan, U.S. Bank National Association, as Trustee
for the Crossgates Mall Mortgage Loan, Wells Fargo Bank, National
Association, as Certificate Administrator for the Crossgates Mall Mortgage
Loan, Wells Fargo Bank, National Association as Custodian for the Crossgates
Mall Mortgage Loan, Park Bridge Lender Services LLC, as Operating Advisor
for the Crossgates Mall Mortgage Loan, CoreLogic Commercial Real Estate
Services, Inc., as Servicing Function Participant for the Crossgates Mall
Mortgage Loan, National Tax Search, LLC, as Servicing Function Participant
for the Crossgates Mall Mortgage Loan, Wells Fargo Bank, National
Association, as Primary Servicer for the Prince Building Mortgage Loan,
Torchlight Loan Services, LLC, as Special Servicer for the Prince Building
Mortgage Loan prior to October 6, 2014, Rialto Capital Advisors, LLC, as
Special Servicer for the Prince Building Mortgage Loan on and after
October 6, 2014, U.S. Bank National Association, as Trustee for the Prince
Building Mortgage Loan, Wells Fargo Bank, National Association, as
Certificate Administrator for the Prince Building Mortgage Loan, Wells
Fargo Bank, National Association as Custodian for the Prince Building
Mortgage Loan, Park Bridge Lender Services LLC, as Operating Advisor for
the Prince Building Mortgage Loan, CoreLogic Commercial Real Estate
Services, Inc., as Servicing Function Participant for the Prince Building
Mortgage Loan, and National Tax Search, LLC, as Servicing Function
Participant for the Prince Building Mortgage Loan.

        Dated: March 25, 2015


        /s/ Helaine M. Kaplan


        President
        (senior officer in charge of securitization of the depositor)