Can I make duaa to my non-Muslim dead parents?
In the Name of Allah, the All-Merciful, the Mercy-Giving
All praise is due to Allah. Peace and blessings be upon His Messenger Muhammad.
Making duaa for a non-Muslim dead person has no avail and is even prohibited by explicit Quranic injunctions. In Surat al-Tawbah we read the following two verses, “Therefore, do not ever pray over any one of them who dies. Nor stand over the grave of such a one, for they have disbelieved in Allah and His Messenger and died while they were ungodly”, [9:84]
“It is not for the Prophet and those who believe to seek forgiveness for the idolaters- even if they are [their] close relatives- after it has become clear to them that they are the Companions of Hellfire.” [9:113]
The Quran clearly prohibits praying over and seeking forgiveness for those who die as disbelievers.
Almighty Allah knows best.