"Mahi has been pulled out from the borewell...she is dead," Gurgaon District Magistrate P C Meena said.
Late Saturday night, rescuers had pierced a hard rock in their effort to reach the girl, trapped in the pit since June 20.
The hard rock was a major hurdle which the rescuers had been struggling to break for the last three days. The slab was located in the horizontal tunnel between the borewell and the pit dug up to rescue the child.
Mahi fell into the borewell at Kho village near Manesar while playing with her friends on June 20, her fourth birthday.
Over 100 officials drawn from army, fire, police, Gurgaon Rapid Metrorail, health and revenue departments, and locals were involved in drilling the pit parallel to the borewell.