The medical aspirant who hailed from Raiwadi area in Haryana was taking coaching at a premier coaching institute in Kota for about an year.
She was found hanging from a ceiling fan at her room in the morning around 7.30 AM, police said, adding she was living with her mother and brother at the rented accommodation.
Her mother had gone out to drop her brother at school at the time of incident, said Sub Inspector Kamal Singh.
"No suicide note was recovered from the room. However, the girl was reportedly depressed over her low score in the routine tests," Singh said.
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The body was sent for the postmortem and further investigation into the matter is underway.
Despite constant efforts by district administration and coaching institute managements to check suicide by the students, at least 15 have taken the extreme step since January this year.
This incident has taken the toll to 16 so far.
Around 1.75 lakh students from across the country arrive at Kota every year for admission in coaching institutes to prepare for entrance exams to these colleges.