Jovetic has been linked with a switch to Serie A champions Juventus after their sporting director Beppe Marotta revealed his desire to take the 22-year-old to Turin.
But Fiorentina sports director Daniele Prade has responded by insisting that it would take a vast cash sum to prise the Montenegro international away from the Viola.
"I spoke with the owners and they told me that the player is not on the market," Prade told Sky Sports Italia.
"But there is a gentlemen's agreement and if someone makes an offer for him close to 30 million euro (£23.5m), without some players in exchange, we can sit at a table and discuss.
"But we want to keep Jovetic."
Prade's chief focus appears to be bringing players to Fiorentina not losing them, with the Italians linked with moves for AZ Alkmaar midfielder Rasmus Elm and Palermo goalkeeper Emiliano Viviano.
But Prade admits no deal is imminent and urged supporters of the club to remain patient.
"Elm? He's an important player but he has several offers.
"Viviano? The situation is on stand-by. We'll talk with Inter and Palermo (co-owners of the player), we have good relations with them and we'll find a solution.
"We will do something in the market. It will be a good Fiorentina but it needs the fans to be patient."