If we just met, yes it is rude. We're strangers, my life story is none of your business. If we're more than acquaintances, I expect it would come up naturally at some point in conversation so not rude (hopefully).

I'm a visible minority so I have to weed out the people who are just trying to satisfy their curiosity about why I'm not white. Those people don't ever accept the answer that I'm from Vancouver, or that my parents are from Winnipeg. I will never be Canadian enough for those people because of how I look.

Nobody ever asks my white spouse out of nowhere whether he speaks X language even though he's given no indication that he does, and nobody ever asks him where he's really from.