Mohammad Asif (26), his son Rehan (5) and Sikander (26) all residents of Khandwa in Madhya Pradesh were killed when driver of the ill-fated vehicle lost control over it, police said.
The injured were rushed to a hospital in Manali and all of them were stated to be out of danger.
The driver of the vehicle and guide were also among the injured.
The tourists had hired the cab from Mandi for visiting Manali and Rohtang Pass.