What is the ruling on cutting ties of kinship with an uncle who celebrated a few days after the death of a brother, and how should this situation be handled?

Severing ties of kinship is not permissible. It is incumbent upon the paternal uncle to help his nephews fulfill the duty of maintaining kinship ties and to choose an appropriate time for the celebration. Mourning for the deceased is not permitted for more than three days, except for the wife, who mourns her husband for four months and ten days.