Weerasinghe, B.A.I.RRajakarunanayake, S2026-01-062025-10-10978-624-6010-11-92783 – 8862https://rda.sliit.lk/handle/123456789/4390Although the role played by mindfulness in developing mental well-being has received much attention, the mediatory role of self-esteem the realm of positive psychology is discussed rarely, especially in the context of non-state universities of a developing country that has face multiple unprecedented challenges in the recent past. A sample of 329 was collected using a self-administered survey questionnaire from non-state universities in Sri Lanka. Data was analyzed by using SPSS 26 and the mediation effect was computed by using PROCESS Macro. A statistically significant positive relationship was found between mindfulness and mental well-being. A partial mediation of self-esteem was found between mindfulness and wellbeing. The findings suggest academics, administrators, and policy makers to integrate more mindfulness-based interventions in associating with undergraduates to ease their academic burden and life battles whilst paying attention to build self-esteem among non-state university students.enMindfulnessself-esteemmental well-beingnon-state universitiesSri LankaArticlehttps://doi.org/10.54389/PCPY8112