It's been suggested new PSG coach Mauricio Pochettino is willing to see Mbappe sold this summer as he wishes to bring in Argentine stars Sergio Aguero, of Manchester City, and Barcelona captain Lionel Messi.
With Mbappe's deal running to 2022, the coming summer market represents the best time for PSG to cash in - and Leonardo has now stated they won't hold onto any player against their will.
He told France Football: "Mbappé and Neymar? I hope they are both convinced that Paris is a good football site for an ambitious and high-level player.
"We just have to reach an agreement to satisfy their wishes and demands according to our financial means. Those who will follow will follow. But they must want to continue in Paris."