"[Enrique] has Champions League aspirations and he is waiting to see whether anyone who has qualified for that competition is willing to come in for him," Pardew revealed.
"That is his right and there isn't much more we can do about it.
"We have tried as hard as we can, in the financial situation we are in, to keep him. We offered him an excellent deal, but he doesn't seem to be interested in signing it at the moment.
"It is frustrating - but that is the situation we are in.
"It is up to him, but he wants to see what else there is for him," the Newcastle manager said.