 On 5 June 2013, Arsenal announced Squillaci, along with teammates Andrey Arshavin and Denílson, would leave the club when their contracts expired on 30 June.On 17 July 2013, Squillaci was unveiled as the Bastia's new number 5 on a one-year contract, with an optional extension for two years.He made his debut in the opening match of the season, a 2–0 loss against Nantes, and since established himself in the starting 11 that helped the club placed in the top ten in Ligue 1.