Emerging adulthood is marked by changes and exploration of life directions and is significantly impacted by crises like the COVID-19 pandemic. This cross-national study examined the psychological, relational, and contextual factors associated with prosocial behaviors- adherence to COVID-19 measures and helping strangers-among emerging adults (ages 18-25) from 14 countries during the pandemic. We assessed empathy, social identification with those affected by COVID-19, family and friend support, and perceived pandemic-related burden while exploring the moderating effects of country-level restrictions and cultural values. Results showed that empathy and social identification were consistently linked to adherence and helping behaviors, with stronger associations observed in countries with moderate to high COVID-19 restrictions. The findings highlighted the complex role of empathy and social identity in fostering prosocial behavior under varying cultural contexts and suggested pathways for enhancing community resilience during global crises.