Summary: We propose an adynamical interpretation of quantum theory called Relational Blockworld (RBW) where the fundamental ontological element is a 4D graphical amalgam of space, time and sources called a “spacetimesource element.” These are fundamental elements of space, time and sources, not source elements in space and time. The transition amplitude for a spacetimesource element is computed using a path integral with discrete graphical action. The action for a spacetimesource element is constructed from a difference matrix \( \mathbf K\) and source vector \( \mathbf J\) on the graph, as in lattice gauge theory. \( \mathbf K\) is constructed from graphical field gradients so that it contains a non-trivial null space and \( \mathbf J\) is then restricted to the row space of \( \mathbf K\), so that it is divergence-free and represents a conserved exchange of energy-momentum. This construct of \( \mathbf K\) and \( \mathbf J\) represents an adynamical global constraint between sources, the spacetime metric and the energy-momentum content of the spacetimesource element, rather than a dynamical law for time-evolved entities. To illustrate this interpretation, we explain the simple EPR-Bell and twin-slit experiments. This interpretation of quantum mechanics constitutes a realist, psi-epistemic model that might underwrite certain information-theoretic accounts of the quantum.