What is the capital of country with fewest resident embassies. I have one example but will add it as answer later (if no one mention it). By country I accept the definition and list of Wikipedia
Two countries do not have resident embassies in capitals: Vatican and Liechtenstein. To be precise Vatican have embassies, but in Rome, not in the city itself. For reference here
Tiraspol, the capital of Transnistria has no embassies.
Interestingly, Transnistria does have three embassies of its own though: Abkhazia, Russia, and South Ossetia.
Stepanakert, the capital of Artsakh also has no embassies.
Yes these are not widely recognized countries...
So I kept looking and found that
Alofi, the capital of Niue, has one high commission and no embassies. Any embassies of the country are non-resident embassies, located elsewhere.
I wouldn't be surprised if other tiny island nations also have none, but I stopped looking.