The highly-rated 21-year-old has been continually linked with a move to Barcelona, although Real Madrid and Manchester City are also believed to be interested.
However, Scolari believes that he would be better served staying in his homeland until after the 2014 World Cup.
"Neymar should have gone to Barca two years ago, but now it is better that he stays at Santos," the 64-year-old told reporters.
"How would he adapt? Would he be by himself? Would he start games? Would he play in this star-studded Barcelona team?
"For the World Cup of 2014 and for Brazil, it is preferable that he does not go right now."
Neymar scored 29 goals in 31 games for Santos last season.