EXHIBIT 31

Rule 13a-14(d)/15d-14(d) Certification

      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, Deutsche Bank
Trust Company Americas as Certificate Administrator, Deutsche Bank
Trust Company Americas as Custodian, 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 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, Torchlight Loan Services, LLC as Special Servicer 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, and Park Bridge Lender Services LLC,
as Operating Advisor for the Prince Building Mortgage Loan.

Date:  January 24, 2014

/s/ Helaine M. Kaplan
Helaine M. Kaplan
President
(senior officer in charge of securitization of the depositor)