Psychosocial support is the largest response area in the GBV programming, yet several members use different approaches, tools, and definitions. The stressors facing women, girls and GBV survivors have been changing as a result of multifaceted crises in Lebanon, therefore showing new or ongoing psychosocial needs that require a variety of programmatic approaches and interventions. In view of harmonizing approaches, this assessment aims to understand the Mental Health and Psychosocial Support (MHPSS) practices in the Gender-Based Violence (GBV) sector in Lebanon. It maps the psychosocial support approaches used, documents best practices and lessons learnt, and defines sectoral minimum standards of care and tools to be adopted by sector members.