The third season of Homicide: Life on the Street aired in the United States on the NBC television network from October 14, 1994, to May 5, 1995, and contained 20 episodes. It was the first full season of episodes. Beginning in the third season, Homicide was moved to Fridays at 10 p.m. EST, a timeslot the show would remain at until its cancellation in 1999.

The third season saw all the original cast members return except for Jon Polito, who was reportedly dropped at the request of NBC. Season 3 also marked the debut of character Lt. Megan Russert, and the final season for both Detectives Beau Felton and Stanley Bolander.

Celebrities who made guest appearance during the third season include Al Freeman Jr., Steve Buscemi, Tim Russert, Howie Mandel and Chris Noth. As with the previous seasons, Season 3 had several episodes air out of order resulting in continuity issues. To make up for this, the episodes "Crosetti" and "Nothing Personal" included title cards in the beginning to tell the viewers the episodes took place in the past. Season 3 also saw the first crossover between Homicide and Law & Order as Chris Noth makes a cameo appearance as Detective Mike Logan in the episode "Law & Disorder".