
<PAGE>
 
                                 EXHIBIT 23.3

                         Independent Auditors' Consent
                         -----------------------------


We consent to the incorporation by reference in Registration Statements Nos. 33-
52044, 33-89528, 33-89530 and 33-61585 of Parametric Technology Corporation on
Form S-8 of our report dated April 4, 1995 (relating to the consolidated
financial statements of Rasna Corporation, not presented separately herein)
appearing in this Annual Report on Form 10-K of Parametric Technology
Corporation for the year ended September 30, 1995.




/S/ DELOITTE & TOUCHE LLP
DELOITTE & TOUCHE LLP

San Jose, California
December 22, 1995
