The Argentina international joined PSG in 2012 following a five-year spell in Italy with Napoli, three years of which were spent working under Mazzarri.
Lavezzi has been linked with a January move away from Paris, but, while Mazzarri is a big fan of the player, the Inter boss is reluctant to be drawn on any transfer rumours.
He told reporters: "He's a great player and a great guy. He was sold to one of the most important clubs in Europe thanks to the three years of work.
"In terms of the market, let's finish the next game first, then we will make our conclusions. We could also remain as we are for this year, but it depends on what the club calls for at the end of the year.
"You have to understand when [Diego] Milito and ]Mauro] Icardi return, they are the first two attackers. I'm not talking about the market anymore because there are three important games that will help me assess the squad."