Club president Unal Aysal has confirmed the Netherlands playmaker has a release clause in his contract and would be powerless to stop his exit should the sum be offered
Sneijder’s future at the Turkish giants has come under scrutiny of late, with Manchester United thought to be among the clubs closely monitoring the situation after Netherlands boss Louis van Gaal agreed to take over as coach.
Galatasaray president Unal Aysal admitted that, despite his desire to keep Sneijder in Istanbul, he would be powerless to stop the player from leaving if the buyout clause were met.
"Sneijder is a good player. We want to keep him at Galatasaray," he told reporters at the unveiling of new head coach Cesare Prandelli.
"If we receive an offer of €20m we do not have the luxury of saying no. That is stipulated in the contract.
"All I can say is that if any club pays us €20m and he wants to go then we can't force him to stay – it's written in his contract."
Sneijder represented Netherlands at the World Cup, where he saw a penalty saved in a semi-final shootout against Argentina that denied them a second consecutive final spot.