The deceased's sons exclude his sister from inheritance
Q: Mr. Muhammad ibn Salim had three sons and a daughter, then one of the sons died.
Does the sister inherit from her full brother?
Bear in mind that the deceased brother left three sons and a daughter. Please give us your Fatwa (legal opinion issued by a qualified Muslim scholar), may Allah reward you!
If the matter is as you mentioned, the sister does not have a share in her brother's inheritance since he left sons. They are the closest of kin who exclude others from the inheritance. (Part No. 16; Page No. 519) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.