Long Arm of the Law Part 3 is a 1989 Hong Kong action film directed by Michael Mak and starring Andy Lau, Elizabeth Lee, Max Mok and Elvis Tsui.

The core theme of the film is the attack of Mainland China and its unjust and brutal law and tells the story of an honorary soldier from China (Lau) who was falsely accused of robbery and illegally flees to Hong Kong, where he ends up working for the triads in order to save his lover (Lee) from being sold as a prostitute. The film is the third entry of the Long Arm of the Law film series, where each of the films have a different storyline.