The larger number of people cross state borders in order to seek for asylum and, then they want to stay in the host state so as to establish a new life for their family day by day. In legal terms international protection is provided for those who are obliged to flee from their country of origin owing to well-founded fear of being prosecuted or undergoing serious damage under the scope of United Nations Convention relating to the Status of Refugees of 1951, they are called refugee. On the other hand, those who leave of their own volition to improve their economic situation are called immigrant. While these terms are interchangeable in daily life, it is legally different. As refugees are subject to international law, the United Nations Convention of 1951 in first, immigrants are bound by internal laws. Even though the difference between a refugee and an immigrant becomes uncertain, for a displaced people owing to conflicts in their country of origin at present, applicable law requires a clear definition. Turkey is a party to the United Nations Convention of 1951 with the geographical reservation so that only people from European Countries who are obliged to flee from their country of origin owing to well-founded fear of being prosecuted or undergoing serious damage will be recognized as a refugee. Because of this geographical restriction, Turkey adopts another term which is called a conditional refugee for those who come from outside of European countries in the same conditions of refugees under the scope of the United Nations Convention on refugees of 1951. When it comes to immigrants, Turkish law gives completely different definition. The Turkish Settlement Law defines immigrant as those who are Turkish origin and subject to Turkish culture and recognized to be inhabited by this law. Thus, immigrants are legally recognized only for certain category of people and will be naturalized immediately. Therefore, there are not foreigners in Turkey in the legal status of immigrants. In the event of a mass influx of displaced persons, it is difficult or impossible to grant international protection to asylum seekers individually; therefore, temporary protection is developed. This term is the outside of international protection, but it is effective and useful for the mass influx of displaced persons. Accordingly, the legal status of Syrians is temporary protection. They cannot be granted the status of refugee under the United Nations Convention of 1951; cannot be recognized as a conditional refugee under the Foreigners and International Protection Law nr. 6458. This paper is to aim to study the definitions of refugee, conditional refugee, immigrant and temporary protection that Syrians in Turkey are subject to and will review the proposition that Syrians should be naturalized in the perspective of international and national law as well as the concept of naturalization itself. As stated by International Court of Justice in the Nottebohm case (Liehtenstein v. Guatemala) is that “Naturalization is not a matter to be taken lightly”. It involves establishment of a new bond of allegiance. In this respect the naturalization of a mass influx of Syrians will be contrary to the concept of naturalization as well as it is against the Turkish Citizenship Law.