According to the police, Desh Raj, who worked at a sweet shop and lived in Uttam Nagar, jumped before the train which was going towards Rajiv Chowk on Dwarka-Noida City Centre corridor.
The incident took place at around 12:00 PM and train services were affected for sometime due to the incident, a Metro official said.
The reason behind the man's extreme step is yet to be ascertained as no suicide note was recovered from the spot, police said.