AB III is the third studio album by the rock band Alter Bridge, released on October 8, 2010. Produced by Michael "Elvis" Baskette, the album is a departure from the band's first two albums, lyrically because it is a loose concept album dealing with darker lyrical themes of struggling with faith, and musically due to its more dynamic and progressive sound. AB III is also the first Alter Bridge album to be released on Roadrunner Records, making it the band's third consecutive album to be released on a different label. The album was released on Roadrunner Records worldwide except North America, where it was self-released on Alter Bridge Recordings via Capitol Records.

The first single off the album, "Isolation," is the band's most successful single to date and was released on September 26, 2010 in the United Kingdom and November 9, 2010 in the United States. AB III has received acclaim from critics, most notably Artistdirect, who called it a "masterpiece.". The album was certified Silver by the British Phonographic Industry, the same certification of the last album Blackbird.