Is it permissible for my sister to marry my father’s step-sister’s son in Islam?

My father step sister’s has a daughter & her son wants to marry my sister and I want to know is it possible or not in Islam.

بسم الله الرحمن الرحيم

(Fatwa: 992/988/B=10/1436)

Yes, this nikah is valid and lawful.

Allah knows Best!

Darul Ifta,
Darul Uloom Deoband

This answer was collected from the official ifta website of Darul Uloom Deoband in India.

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