Community gardens, rooted in Iranian-Islamic culture, have experienced extensive growth in recent years, particularly following the COVID-19 pandemic, emerging as a widespread phenomenon in Iran's metropolises. This study aimed to recognize them as an "Iranian-Islamic third place" within the framework of urban regeneration, employing a systematic review and qualitative meta-synthesis based on the PRISMA 2020 protocol. A search in national and international scientific databases (2019-2025) led to the selection of 60 final studies. Qualitative analysis using MAXQDA software extracted six main themes: alignment with the characteristics of the Iranian-Islamic third place (90%) , social role in neighborhood regeneration (87%) , environmental role and climate resilience (80%) , nutritional role and local food security (73%) , contextual moderating factors (70%) , and outcomes of urban regeneration and identity revival (83%). The results indicate that by integrating Oldenburg's eight features and components of Iranian-Islamic identity, community gardens have filled the post-pandemic gap in informal interactions and contributed to reducing the urban heat island effect, strengthening food security, and the sustainable regeneration of dilapidated urban fabrics. By presenting a native framework for the "Iranian-Islamic third place," this research introduces an operational model for the integrated management of the urban environment and public spaces and suggests that these gardens be prioritized as "community-driven and resilient regeneration cores" in the planning and policymaking of urban environmental management.