The court has been hearing arguments on the punishment to be awarded to the three convicts since April 2014.
The convicts had sought leniency in sentencing as well as exemption from death sentence saying they can reform and their act was not so brutal or gruesome that it deserved capital punishment.
On the other hand, the victim's mother, Neelam Katara, and the Delhi Police had demanded death for the trio, terming their offence to be the rarest of rare.
The high court had on April 2, 2014, upheld the verdict of the lower court in the case by describing the offence as "honour killing" stemming from a "deeply-entrenched belief" in caste system.
The high court had dismissed the appeals of the convicts and kept pending two separate pleas of the state and Neelam Katara seeking death penalty for them.
Katara was abducted and killed by Vikas, Vishal and Sukhdev as they did not approve of the victim's affair with Bharti because they belonged to different castes, the court had said.