Though the description is kinda vague, I don't think it would apply to ALL Russian citizens and residents, since the US sanctions are against specific Russian organizations and citizens, not the country as a whole. So unless a Russian citizen/resident is specifically on a US sanction list, there would be no legal basis to block them.

Technically, those "restricted locations" would currently be Cuba, Iran, North Korea, Sudan, and Syria.

https://www.bis.doc.gov/index.php/policy-guidance/country-guidance/sanctioned-destinations