The United Nations Joint Programme for the Prevention of Child, Early, and Forced Marriage in Turkey, implemented by the United Nations Children’s Fund (UNICEF), International Organization for Migration (IOM), United Nations Population Fund (UNFPA), United Nations Entity for Gender Equality and the Empowerment of Women (UN Women) and United Nations High Commissioner for Refugees (UNHCR) with the financial assistance of Swedish International Development Cooperation Agency (SIDA) takes a multi-sectoral and holistic approach for conducting both prevention and intervention activities to strengthen national mechanisms for protection of women and children, and to promote positive social norms aiming to prevent child, early and forced marriages. In this scope and with this aim, this guideline has been prepared to provide fundamental information about prevention of CEFM.