Ilicic has recently been linked with the likes of Chelsea, Bayern Munich and Tottenham.
“Certainly there is great interest in Josip, also from England, Germany, and Spain,” Amir Ruznic told calciomercato.it.
“These teams know he cannot move in January due to FIFA regulations, but in June if there is an important offer the president [Maurizio Zamparini] will decide.
“The lad is having a great time in Palermo, he isn’t missing anything. He has the confidence of the coach and the club, a good relationship with his team-mates and the affection of the fans. He’s really happy here.”