Form 497J FIRST TRUST COMBINED

First Trust Portfolios L.P.

120 EAST LIBERTY DRIVE

SUITE 400

WHEATON, ILLINOIS 60187

October 3, 2022

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Re: THE FIRST TRUST(R) COMBINED SERIES 315

(SEC File No. 333-166974)(CIK No. 1491078)

Ladies/Gentlemen:

In accordance with the provisions of Rule 497(j) of Regulation C under the Securities Act of 1933 (the "Securities Act") this letter serves to certify that the most recent post effective amendment to the registration statement on Form S-6 for the above captioned Trust does not differ from that which would have been filed pursuant to Rule 497(b) of the Securities Act. Post effective Amendment No. 12, which was the most recent post effective Amendment to the Registration Statement, was filed electronically with the Commission on September 30, 2022.

Very truly yours,

The First Trust(R) Combined Series 315, Registrant

/s/ First Trust Portfolios L.P.

By: First Trust Portfolios L.P., Depositor

You May Also Be Interested In

• FUTURE OF SPACE CELEBRATES WORLD PENGUIN DAY APRIL 25th BY SENDING 275 PLUSH PENGUINS INTO ZERO GRAVITY
• ROSEN, LEADING INVESTOR COUNSEL, Encourages Doximity, Inc. Investors to Secure Counsel Before Important Deadline in Securities Class Action – DOCS
• SHAREHOLDER ACTION ALERT: The Schall Law Firm Encourages Investors in Compass Minerals International, Inc. with Losses to Contact the Firm