Dutchman played over 4 years for the Istanbul-based club
Sneijder had one year remaining in his contract. The 33-year-old attacking midfielder was transferred from Italian Serie A club Inter Milan in January 2013.
He tallied 46 goals and 44 assists in 175 appearances during his four-and-a-half-year spell with the Istanbul-based club.
The Dutchman won two Turkish Super Lig titles, three Turkish Cups and three Turkish Super Cups while he was a Galatasaray player.