OBJECTIVES: A qualitative interpretive-systemic focus group study was conducted to examine the developmental and implementational underpinnings of Asia's first national Advance Care Planning (ACP) programme constituted in Singapore. METHODS: 63 physicians, nurses, medical social workers, and allied health workers who actively rendered ACP were purposively recruited across seven major public hospitals and specialist centers. RESULTS: Framework analysis revealed 19 themes, organized into 5 categories including Life and Death Culture, ACP Coordination, ACP Administration, ACP Outcomes, and Sustainability Shift. These categories and themes formed an Interpretive-Systemic Framework of Sustainable ACP, which reflects the socio-cultural, socio-political, and socio-spiritual contexts that influence ACP provision, highlighting the need to adopt a public health strategy for enhancing societal readiness for end-of-life conversations. SIGNIFICANCE OF RESULTS: The Interpretive-Systemic Framework of Sustainable ACP underscores the importance of health policy, organizational structure, social discourse, and shared meaning in ACP planning and delivery so as to support and empower care decision-making among terminally ill Asian patients and their families facing mortality.