According to French sports newspaper L’Equipe and the New York Times, which cited people familiar with the matter, the other two players are Angel Di Maria and Leandro Paredes, though PSG declined to confirm their identity to CNN.
French media said the three teammates all tested positive after returning from vacation in Ibiza, Spain.
CNN has reached out to each of the three players’ representatives for comment.
Neymar, along with the other two players, now faces the prospect of missing the start PGS’s 2020/21 season, due to begin on September 10 when it travels to face Lens.
The French domestic league season is already underway but PGS’s start has been delayed because of the side’s run in the Champions League.
There are strict Ligue 1 protocols requiring players that have tested positive for the virus to self-isolate.
Ligue 1 was the highest profile European professional football league not to resume matches following the coronavirus pandemic, with PSG handed the title with Thomas Tuchel’s side 12 points clear at the top before play was suspended in March.