The United States and North Korea do not have diplomatic relations with each other, and therefore neither hosts a diplomatic mission of the other, although NK does maintain a mission to the United Nations in New York. In NK, an arrangement exists whereby Sweden provides consular services to US citizens in NK, acting as the "protecting power" of the US in that country.
What about the other way around? Is there a NK "interests" section in the US, a consular arrangement for NK citizens, a protecting power arrangement, or some other kind of proxy or third-party arrangement or similar, for citizen or business protection or state representation or both, and if so what are the details??
I am aware that South Korea views at least most NK citizens as its own citizens, but that is not what I am asking about.