The Usūliyya and the Nusayriyya are two separate branches of the twelver Shiʿīsm. These two branches continued to exist in complete detachment from one another for about a 900 years, from the beginning of the 11th century until the first quarter of the 20th century. The rupture in the 5th/11th century happened at a time when the Nusayriyya experienced a decline in religious, cultural and political arenas due to various internal and external factors. As a result, the Nusayriyya lost the ability to communicate with other religious groups and became an isolated branch of Shiʿīsm. When the group’s interactions with others increased in the first quarter of the 20th century, the connection between the Nusayriyya and the Usūliyya was re-established and laid the foundations of a closer relationship. This article discusses the course of the Usūliyya-Nusayriyya relationship from the 20th century to the present day and aims to make a modest contribution to the topic. The descriptive method of the social sciences as well as the interpretative method was employed in this study. In addition to the works of Usūlī and Nusayrī scholars, which are the primary sources for this examination, other works containing supplementary information were also referenced.