Mateta scored 17 goals in all competitions last season as Palace won the FA Cup to lift the first major trophy of their 164-year-old history.
He has previously played in France's youth teams and featured at the Paris Olympic Games last year, winning a silver medal.
France face Azerbaijan and Iceland in a pair of World Cup qualifiers this month, where Mateta will be hoping to make a case for his inclusion in Deschamps's squad for next year's World Cup in North America.
"He has to do what he knows how to do, which is to play as naturally as possible," Deschamps told reporters on Monday.
"He has a good habit of scoring goals, whether for his club or with the younger teams and the Olympic team during the Olympic Games. So this is a big moment for him. Let him come with his enthusiasm and his qualities.
"He knows most of the players because he's had seen in the younger teams too. It's not about winning me over (personally). That's not how it works. (He has to prove himself) in the team, in training and during matches."
Group D leaders France host bottom side Azerbaijan at the Parc des Princes on October 10 before travelling to face second-placed Iceland three days later.