"I ask the government of Pakistan not to make any hasty decision in this regard," he added.
Afzal, convicted for his role in the 2001 terrorist attack on the Parliament House, was hanged and buried in Delhi's Tihar Jail on Saturday.
In the wake of the execution of Ajmal Kasab, the lone surviving Mumbai attacker, and Afzal, some Pakistani groups and media commentators have called for the hanging of Sarabjit.
Sarabjit has been on death row in a Pakistani jail since he was convicted for alleged involvement in a string of bomb attacks in Punjab that killed 14 people.
His family says he is a victim of mistaken identity.