The aim of this study is to assess the impact of sudden parental bereavement on subsequent attainment of developmental competencies. This longitudinal study reports on 126 youth bereaved by sudden parental death (suicide, accident, or natural death) and 116 demographically similar nonbereaved controls assessed at 9, 21, 33, and 62 months after parental death, and at comparable times in controls. Half were female and 84.7% Caucasian. Youths and care-giving parents were assessed on psychiatric disorders, psychological characteristics, and contextual variables antecedent and subsequent to bereavement. At Month 62, at which time youth on average aged 18.4 years (SD = 3.1), participants were assessed on developmental competence using an adaptation of the Status Questionnaire, peer attachment using the Inventory of Parent and Peer Attachment, and educational aspirations using the Future Expectations Scale. The bereaved and nonbereaved groups were compared using univariate and multivariate statistics, including path analyses. On univariate analyses, bereaved youth had more difficulties at work, less well-elaborated plans for career development, lower peer attachment, and diminished educational aspirations. The effects of bereavement were most commonly mediated via its effects on offspring and caregiver functioning and family climate, even after adjusting for the impact of predeath characteristics. Outcomes were unrelated to age at the time of parental death, gender of the deceased parent, or cause of death. Children who lost a parent to sudden death evidenced lower competence in work, peer relations, career planning, and educational aspirations, primarily mediated by the impact of bereavement on child and parental functioning and on family climate. (Contains 4 tables and 4 figures.)