The case against the Muslim cleric, accused of framing her, will proceed, says the BBC's Orla Guerin in Islamabad.
He will be tried for making a false accusation.
There has been no word yet from Rimsha or her family, our correspondent says. They remain in hiding.
Blasphemy is a highly sensitive issue in Pakistan, where 97% of the population are Muslim.
Critics say the controversial laws are misused all too often - to persecute minorities or settle scores.