The body of the woman with injury marks all over her body was found on the footpath of Ripon Street and police were awaiting the autopsy report, Kolkata Police said.
A senior Kolkata Police officer said the manager of the hotel knew the victim and her male friend - the suspected murderer who had put up at his hotel.
The woman, who was in her mid-20s, is suspected to have been murdered inside the hotel room which had been rented by her male friend on Friday, he said.
The manager had reportedly said during grilling that the suspect had come rushing to him saying that the woman had committed suicide by hanging herself from the ceiling.
He had also reportedly said the suspect then went out looking for a doctor. But when he did not return the manager had asked the hotel workers to dump the body on the footpath adjacent to the hotel.