The level of psychosocial well-being of adolescents after genocide against Tutsi in Rwanda needed much attention. The loss of parents and other members of the
families during Genocide; children and adolescents have taken the responsibilities at early age. The objective that guided this study is to establish the levels of
psychosocial well-being among catholic secondary school students raised up by single parenting in the Catholic Diocese of Butare in Rwanda. This study used
psychosocial development theory and social cognitive theories. This study used concurrent, convergent research design for quantitative and qualitative approaches.
The target population was 314, and a sample size of 210 participants. Quantitative data was collected through a questionnaire and was analyzed using SPSS, while
qualitative data was collected through interviews and analyzed using the thematic analysis method. The study found that the level of psychosocial well-being among
catholic secondary school students raised by single parenting was 29.2% good, and 17.9% was excellent. The socialization level was good because these students
know how to create friends in school and maintain them. Students actively participated in school activities and curriculum activities in school. However, 27.8%
was marginal, which expressed slight issues like depression, anxiety, and bizarre behaviour that were observed in a few students in the school.