The “populist wave” in the EU member states is no longer a phenomenon isolated in domestic politics. It has a projection on the sphere of foreign policy of national states and the European Union. The article aims to “shed light” on the barriers arising on the way of conceptualizing and typologizing the foreign policy orientations of populist actors, relying on an ideological approach to populism. The study revealed that the main constraints for the conceptualization and typologization of populists' foreign policy are the fragmented nature of populism as an ideology, the limited ability to translate their attitudes into the political course, and gradual mainstreamization after coming to power.