Nationalism in Turkish Left: Three Sources, Three Turn Overs Ecehan Balta Nationalism is one of the most influential parts of dominant ideology on socialist left in Turkey. It has been very hard for the left to constitute its own independent and internationalist perspective in where determining ideological discussions are secularanti secular, imperialismindependence etc at societal and political levels. The reasons of how nationalism could leak this much into the socialist movement is very complex and hard to be settled. The aim of this article is not to discuss the reasons, but to show the political continuity and profoundness of nationalism in Turkish socialist left. To reach this aim, three sources and three turn overs have been defined: the first source is the way of ‘solution’ of national question in exUSSR which derives also from the uncertainties of Marxist theory on national question. The second source is Sultan Galiyevism that influenced the Turkish intellectuals of the same period. Third and latest one is circle of Türk Yurdu whose ideas could have been directly related with Sultan Galiyev and others. The turn overs defined in this article are Turkish Communist Party of Mustafa Suphi, Kadro Movement of 1930s and Yön-Devrim Movement of 1960s. The belief behind this article is that if Turkish left could define and develop a critical approach on the channels that nationalism have been leaked into its history, it has a bigger chance to abolish nationalism from both theoretical and political agenda and develop an internationalist consciousness and practice.