Process Essays, Vol. III: Metaphysics completes the transition from process-based philosophy to a fully articulated metaphysical framework. Building on the foundations established in earlier volumes, it develops a minimal, non-substantialist account of reality grounded in differentiation, constraint, and stabilization. It also engages deeply with philosophical and contemplative traditions, showing how process-based metaphysics clarifies long-standing issues in Buddhist philosophy—particularly dependent origination, momentariness, and the non-existence of intrinsic essence—while remaining compatible with contemporary physics.