The aim of the article is to analyze Armenia’s limited capacity to function as a patron of the Nagorno-Karabakh Republic (NKR). In the article, the author focused on the analysis of 3 levels of relations on the line Yerevan-Stepanakert: (1) the political dimension of bilateral relations; (2) the economic dimension of bilateral relations; (3) the security policy dimension, in particular the significance of the last phase of the armed conflict in Nagorno-Karabakh (2020) for the further shape of relations. In addition, the features that distinguish Armenia’s relations with the NKR from Russia’s relations with the de facto states for which it is a patron are highlighted. The results prove that mid-level states have a limited capacity to be a patron for de facto states, including being a guarantor of their survival.