Islam’s introduction to Bulgaria and the emergence of Turkish-Mus-lims in these lands date back to ancient times. Historians note the presence of Turkish tribes in the Dobrudja region, now Northern Bulgaria, as early as the 10th century AD. Additionally, Islam as a social phenomenon in Bulgaria signifi-cantly materialized during the Ottoman period in the 14th-15th centuries throu-gh settlement policies. The Ottoman period witnessed substantial contributions of Islam and Muslims to various fields, particularly civilization and architecture. This paper explores the effects of Islam in Bulgaria through different forms of religious interpretation. The region’s societal diversity and interest in Islamic movements have facilitated the growth of various schools of thought. In the late 13th century, the Bektashi dervish Sarı Saltuk settled in Bulgaria with his tribe. Bektashism, reflecting Central Asian Turkish culture, spread from Anatolia to the Balkans and notably influenced Bulgarian society. Consequently, Alevism-Bek-tashism became a primary form of religious interpretation in the Balkans, es-pecially in Bulgaria. During the Ottoman period, the Hanafi-Mâturidî interpre-tation of Islam was widely adopted in Bulgaria. Several Sufi orders, including Bektashism, Mevlevism, Rufailism, and Naqshbandism, flourished alongside Hanafi-Mâturidî interpretations. In post-Ottoman Bulgaria, particularly after the end of communism, new religious movements such as Wahhabism, Bahá’íism, and Qadianism gained followers and began spreading their views. These move-ments targeted the dense Turkish-Muslim population in Bulgaria. The influence of these movements on Hanafi-Mâturidîs, driven by various factors including the lack of religious education, has been significant. This paper aims to evaluate the impact of these newly encountered movements on the Turkish-Muslim com-munity, highlighting why they have been effective and their subsequent effects.