The present study examined psychological factors influencing emotional functioning among young adults, with a focus on the predictive role of adult attachment styles on the fear of compassion. Grounded in theories of attachment and compassion-focused emotional regulation, the study employed a quantitative, non-experimental, cross-sectional research design. The sample consisted of 120 young adults aged 18–30 years, selected using convenience sampling. Data were collected using standardised self-report measures, including the Attachment Styles Questionnaire (ASQ) and the Fears of Compassion Scale. Multiple linear regression analysis was used to examine the predictive influence of five attachment dimensions—Secure, Anxious Preoccupied, Fearful Avoidant, Dismissive Ambivalent, and Merging—on the three flows of fear of compassion. The findings revealed that attachment styles significantly predicted fear of compassion across all domains, explaining between 49.3% and 56.2% of the variance in the models. Secure attachment was identified as a significant negative predictor, whereas Fearful Avoidant attachment emerged as a primary positive predictor for fear of compassion for self and from others. Furthermore, Dismissive Ambivalent attachment significantly predicted higher levels of fear in expressing compassion toward others. The study highlights the fundamental role of internal working models in shaping emotional experiences during young adulthood and underscores the importance of attachment-informed and compassion-focused mental health interventions