Noting an overreliance on North American and European-based understandings of race and ethnicity, many sociologists have called for research in new spaces. But the same conceptual and regional limitations apply to several other studies. One example of this is multiculturalism. Scholars tend to associate multiculturalism with international migration and ethnic pluralism. As such, they typically study multiculturalism in the most ethnically diverse (and often most affluent) countries – that is, in Europe and North America. But international migration does not always result in ethnic pluralism. For example, diasporic return migration often leads to the convergence of internally diverse co-ethnic populations in ethnically homogeneous nation-states. The diasporic ‘returnees’, who were born outside of their perceived homelands, come through targeted migration policies, face various levels of discrimination, and yet contribute significantly to the economic development and cultural diversity of the countries to which they relocate. As such, this article argues that the multiculturalization of monoethnic nationhood is substantially driven by diasporic return migration. In exploring diasporic multiculturalism, the article draws from data collected in Yerevan, Armenia.