I think your personal relationship to the deceased is key here, and it sounds like your uncle is a very close relation.  How old is he?
assitant
Are you sure he was related to you?
assistant
How should I dress when attending a funeral?
user
It sounds like you’re wanting some help with the etiquette here, and since I’m not sure what’s appropriate, why don’t I just ask you some questions and we’ll go from there?
assistant
Okay
user
What’s the relationship between the person who died and you?
assistant
My uncle
user