Street Fighter Alpha 3, released as Street Fighter Zero 3 in Japan, Asia, South America, and Oceania, is a 1998 fighting game developed and published by Capcom for arcades. It is the third and final installment in the Street Fighter Alpha sub-series, which serves as a sequel to Street Fighter Alpha 2, and ran on the same CP System II hardware as previous Alpha games. The game was produced after the Street Fighter III sub-series has started, being released after 2nd Impact, but before 3rd Strike. Alpha 3 further expanded the playable fighter roster from Street Fighter Alpha 2 and added new features such as selectable fighting styles called "isms".

Alpha 3 has also been released on a variety of home platforms starting with the PlayStation version in 1998, which added an exclusive World Tour mode and brought back even more characters, with further versions on the Dreamcast, Sega Saturn, Game Boy Advance, and PlayStation Portable.