Clashes broke out between protestors and security forces in Hawoora Mishipora village in Qoimoh area of Kulgam in south Kashmir, a police official said.
He said they used force to disperse the protestors and three people were killed, the official said.
Doctors at the Frisal hospital said all three civilians were brought dead.
A curfew has been imposed in Tral and Pulwama ahead of the second death anniversary of Burhan Wani.
The clashes are still on in the area and internet and rail services have also been suspended.