August 8, 2019

Jigar Raythatha
Chief Executive Officer
Constellation Pharmaceuticals, Inc.
215 First Street, Suite 200
Cambridge, MA 02142

       Re: Constellation Pharmaceuticals, Inc.
           Registration Statement on Form S-3
           Filed August 2, 2019
           File No. 333-232992

Dear Mr. Raythatha:

       This is to advise you that we have not reviewed and will not review your
registration
statement.

        Please refer to Rules 460 and 461 regarding requests for acceleration.
We remind you
that the company and its management are responsible for the accuracy and
adequacy of their
disclosures, notwithstanding any review, comments, action or absence of action
by the staff.

       Please contact Jeffrey Gabor at 202-551-2544 with any questions.



                                                            Sincerely,

                                                            Division of
Corporation Finance
                                                            Office of
Healthcare & Insurance
cc:    Lia Der Marderosian, Esq.