Disney Sing It High School Musical 3 takes place on the last day of school, where the main characters are getting ready for their graduation. Troy Bolton and Gabriella Montez have to figure out what they want to do with their future, while also dealing with the pressure from their families and friends.
The gameplay involves singing along to songs from the High School Musical franchise. Players use a microphone-like controller to belt out their favorite tunes, which are performed by the game's cast of characters. The goal is to get the highest score possible by hitting the right notes at the right time.