The woman was reportedly visiting Pakistan on a business trip and was staying at a house in Lahore.
According to her complaint to the police, two women approached her and invited her to dinner. They went to a cafe, where three men were waiting for them.
She alleged that the men offered to drive her and two other women and later took them to an unidentified flat, Dawn reported.
According to the complaint, the group consumed alcohol and the woman alleged that she was given a drink that caused her to lose consciousness.
She alleged that the three men then gang-raped her and left her locked inside the flat until around 2 p.m.
The woman further alleged that the suspects later returned, dropped her near Ghazi Interchange and fled the scene.
She also alleged that the suspects took her mobile phone and luggage.
Police have registered a case and launched an investigation into the incident.