A portable heater shield assembly for directing heat laterally away from a heat source includes a plurality of panels that removably engaging each other to form a disk. Each of the panels is comprised of a heat resistant material. A plurality of brackets is each removably coupled to a heat source having the brackets being vertically oriented. The disk is positionable on top of the brackets when the brackets are removably coupled to the heat source having the disk spaced upwardly from the heat source. In this way the disk directs heat laterally away from the heat source for warming users sitting around the heat source.