Police say the girl was assaulted because her elder sister had registered a case of harassment against the prime accused Goldy.
Goldy was jailed following the complaint.
When he came out of the jail, Goldy, along with two other men, kidnapped and raped the younger sister.
The young teenager was also threatened with dire consequences to her family if she reported the matter to the police.
On Wednesday, the girl shared her ordeal with her elder sister, who then approached the police.
Police said the teenager, in her complaint, has also alleged that two of the three suspects had also raped her elder sister in the past, but they did not file any report.
The Amritsar police has registered cases of abduction and sexual assault against the three men who are yet to be arrested.