The girl, identified as Yogita, suffered injuries on her hands and her left leg was fractured.
At around 5.15 PM, she jumped from the third floor of Vaishali Metro Station. She was taken to a nearby hospital.
"Her left leg was fractured and she also suffered injuries in her hands and head. However, her condition is stated to be normal", said a police officer.
Eyewitness said she was talking on the phone before attempting suicide.
The girl's father Anil Sharma told police that on Saturday's morning, she left for her school. It was only when parents approached the school authorities that the latter informed them that his daughter did not come today.
Later, the girl's father registered a missing complaint. At around 5 PM, she called her father on phone informing her that she was coming home, added the officer.