The midfielder has been linked with Arsenal.
But Tare says: “Signing young players means giving them time to grow. Doing it here in Rome sends an important signal for the future.
“We are not even considering the possibility of Milinkovic-Savic leaving. These players must be given the time and space to develop and he's already at a big club on a big stage.
“In Rome we are accustomed to talking about exits, but we consider Lazio to be a point of arrival and that's what we are working towards."