The (UMK3) iOS IPA refers to a discontinued 3D "remaster" of the classic fighting game originally released for mobile devices by EA around 2010. Because the game was removed from the official Apple App Store years ago, it can now only be found as a legacy IPA file on community archive sites. Key Game Features
If you still wish to proceed, here are the general steps for sideloading an app, which might apply to your situation. Keep in mind, these steps are highly dependent on the specific tools and version of iOS you're using: Ultimate Mortal Kombat 3 IPA Cracked for iOS F...
This specific version was unique compared to the arcade original as it featured instead of 2D digitized sprites. The (UMK3) iOS IPA refers to a discontinued