Relentless 3 is a 1993 crime thriller film written and directed by James Lemmo.

Relentless 3 was filmed in Los Angeles, California, USA.

The first time in 1993 on the Jeff Goldblum, Aerosmith #19.3 episode as a poster on the counter in "Karl’s Video Store" and again on The Best of David Spade in 1995, again a poster on the counter in the same store.

[citation needed] Sam Dietz returns to Los Angeles from "up North" and agrees to consult on a serial killer case.

In 2006, Image Entertainment released a double feature DVD containing this and the fourth film.