Ultimate Mortal Kombat 3 (UMK3) is a fighting game in the Mortal Kombat series, originally developed and released by Midway Games to arcades in 1995. It is an update of 1995's earlier Mortal Kombat 3 (MK3) with an altered gameplay system, additional characters and stages, and some new features.
Several home port versions of the game were soon released after the arcade original, although none were completely identical to the arcade version. Later home versions emulated the arcade original with more accuracy, including Mortal Kombat Arcade Kollection, which included the game alongside its predecessors Mortal Kombat and Mortal Kombat II. Some versions were released under different titles: Mortal Kombat Advance for the Game Boy Advance and Ultimate Mortal Kombat for the Nintendo DS. The iPhone/iPod version recreates the game using a 3D graphics engine.