The accident happened around 1 am when they were returning home in Chipabarode town of Baran district after attending a Dussehra procession here, Sub-Inspector with Borekheda police station, Deshhraj, said.
Khemraj Khushwa (28), who was driving the car, Jitendra Gujjar alias Siddhu (20), and Chetan Nayee (25) died on the spot, he said.
"Injured Satish Kumar has been admitted to the Kota Heart Hospital," he said, adding they were all friends and had come here to attend a Dussehra procession.
Their bodies have been handed over to their families after post-mortem.
A case has been lodged under relevant sections of the IPC, he added.