"Sour Suite" is a song written by Burton Cummings and performed by The Guess Who. It reached #12 in Canada and #50 on the Billboard Hot 100 in 1972. The song was featured on their 1971 album, So Long, Bannatyne.The song was produced by Jack Richardson.The single's B-side, "Life in the Bloodstream", also charted reaching #39 in Canada.