The Ivory Coast international left the Nou Camp in 2010 to join Manchester City for a fee believed to be in the region of £24m.
However, the 28-year-old has revealed that he still holds his former employers in the highest regard.
"It's been the most important team for me and if they call you don't think twice," Toure told RAC1. "I love Barcelona."
Toure made over 100 appearances for Barca during his three-year stint with the club.