Question Summary:
I am a revert Muslim. Can I attend a Buddhist family funeral?

Question Detail:

My family is Buddhist and I am a revert Muslim. Am I allowed to go to my family funeral? (Can I attend Buddhist Funeral as a Muslim?) Thank you so much.

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
It is not permissible to attend to the religious activities of a non-muslim funeral. However, a very close family member may confine his presence to the funeral to express or accept condolences to the bereaved family ¹.
And Allah Ta’āla Knows Best
Bilal Ishaq (Issak)
Student Darul Iftaa
Leicester, England, UK 
Checked and Approved by,
Mufti Ebrahim Desai.
[1] Fatawa Mahmudiyyah V 13 page 440, Maktabah Mahmudiyyah
   Kifayatul Mufti, V 4 Page 190, Maktabah Haqqaniyyah