Teenage Mutant Ninja Turtles III (subtitled Turtles in Time in PAL region and streaming releases) is a 1993 American superhero film based on the Teenage Mutant Ninja Turtles characters created by Kevin Eastman and Peter Laird. Written and directed by Stuart Gillard, it is the sequel to Teenage Mutant Ninja Turtles (1990) and Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991), and the third installment in the original Turtles film trilogy. It stars Elias Koteas, Paige Turco, Vivian Wu, Sab Shimono, and Stuart Wilson with the voices of Brian Tochi, Robbie Rist, Corey Feldman, and Tim Kelleher. The plot revolves around the "Sacred Sands of Time", a mystical scepter which transports the Turtles and April back in time to feudal Japan, where they become embroiled in a conflict between a daimyō and a group of rebellious villagers.

The film was released theatrically in the United States on March 19, 1993, by New Line Cinema. It received mostly negative reviews with a general consensus from the critics that the film did not feature any villains and stories from the original Mirage comics or the 1987 animated series. It received moderate box office success, though it was the lowest-grossing entry in the series, grossing $54.4 million against a budget of $21 million. An animated film called TMNT was released in 2007 by Warner Bros. Pictures, and acknowledges the prior live-action films. The film series was completely rebooted with 2014's Teenage Mutant Ninja Turtles, released by Paramount Pictures, following the acquisition of the franchise by Viacom and Nickelodeon.