My oldest son got in two years ago out of state with 3 years of Spanish. He applied to the college of engineering. We were told during the alumni admission session that it is frowned upon to have less than four years of a foreign language. She said it may not matter as much for the college of engineering, but it would be a negative for the college of arts and sciences where your son would apply.
UVA is such a difficult admit out of state I think it is smart not to have any glaring “negatives” on your application.