"Anthony started the season very early and he has already played a lot in a system that is different to ours. He needs to be more consistent despite his qualities," Deschamps told British media of the 20-year-old.
"He can make the difference in a game because he's fast and powerful and can score and assist. At this age, even if he has already proved a lot, he has to go through that stage. He has to maintain a certain level of performance for weeks and months."
Martial made three appearances in Euro 2016 and Deschamps believes fatigue could have affected his performances in France.
"He's played a lot. He's the one who played the most last season and that's why he was a little unfit at the European Championships. He has a lot of qualities," the 47-year-old added.
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Martial was named in Deschamps' 23-man squad for a friendly against Italy in Bari on Thursday and a World Cup qualifier against Belarus in Borisov five days later.
(Reporting by Ian Rodricks in Bengaluru)
