The accused student allegedly killed a seven-year-old student in a private school in Gurugram in September last year.
Allowing the petition of the accused, who challenged the lower court's verdict that he be tried as an adult, Justice Daya Chaudhary set aside the order of the Gurugram sessions court and the Juvenile Justice Board.
The court asked the JJ Board to consider evidence and contentions proposed by the accused in his petition.
The accused, as per the Central Bureau of Investigation (CBI) charges, had brutally killed the minor student with a sharp weapon to get the school examinations and parent-teacher meeting deferred.
(With inputs from agencies.)