The party was at a home on Arncliffe near Challie.
According to police, a group of men was standing in the driveway around 12:30am when a white Ford Explorer pulled up.
A man in the SUV allegedly asked the men if they belonged to a gang. When they replied, someone from the vehicle started shooting, police said.
Officials said more people in a pickup truck then fired back. Three people were hit.
All three victims went to the hospital in stable condition.
Both the SUV and the pickup truck fled the scene.