Background <p>Teachers diagnosed with mental illness remain an under-recognised and under-supported group within the education workforce, yet the policies intended to support them within school systems often lack coherence, depth, or alignment with contemporary mental health frameworks. This study aimed to critically analyse existing South African School mental health policies that support teachers diagnosed with mental illness and those battling mental illness relapse, using Bronfenbrenner’s Ecological Systems Theory and the Stress-Vulnerability Model to identify strengths, gaps, and opportunities for improved mental health support within educational settings.</p> Methods <p>This study employed a qualitative document analysis design using the READ approach to critically analyse existing South African School mental health policies related to the management and support of teachers diagnosed with mental illness. A theory-driven data extraction tool was developed, informed by Bronfenbrenner’s Ecological Systems Theory and the Stress Vulnerability Model, to assess the extent to which policies address multi-layered environmental influences, workplace stressors, mental illness relapse management, referral pathways, and reintegration procedures.</p> Results <p>There is no policy or framework that is specifically designed for teachers diagnosed with mental illness. Only four South African Department of Basic Education policy documents met the study’s inclusion criteria. Thematic analysis revealed three key themes: (1) teachers as secondary stakeholders in school mental health policies, reflecting how policies provide minimal attention to teachers’ mental health despite their mandated role in supporting learners’ mental health; (2) Policy gaps in addressing mental illness, and (3) leave provisions for teachers diagnosed with mental illness. Although some policies and frameworks reference teacher wellbeing, they all position teachers as implementers and secondary beneficiaries. None of the policies and frameworks provides comprehensive, coordinated, or ecologically aligned guidance for managing mental illness, preventing mental illness relapse, or supporting reintegration.</p> Conclusion <p>This study advocates for a policy to be specifically designed for teachers diagnosed with mental illness and for teachers’ mental health to be integrated into the existing School mental health policies. Strengthening policy integration, explicitly incorporating ecological and stress-vulnerability principles, and formalising relapse-prevention pathways are urgently needed to support teacher wellbeing and sustainable workforce functioning. Strengthening teacher mental health support requires multi-level, ecologically aligned policy approaches that integrate prevention of mental illness relapse, early identification of mental illness, and reintegration mechanisms post mental illness relapse within schools.</p>