The Brazilian has been out for more than two months with a metatarsal problem during which time PSG have continued their march towards the domestic title but stumbled out of the Champions League at the last 16 stage.
"Neymar is feeling good, no pain," Tuchel told reporters on the eve of PSG's game at Toulouse.
Neymar's return had been scheduled for mid-April, although there were hopes he would make a fast recovery.
"But it's too soon to talk about having him back on the pitch. We have to be patient," added Tuchel.
PSG will already be without injured Angel Di Maria, Thomas Meunier and Julian Draxler on Sunday. However, those omissions should not be of major concern as PSG command a 20-point lead at the top of Ligue 1.
(Reporting by Julien Pretot; Editing by Christian Radnedge)
