This disclosure provides a hinge apparatus, a foldable apparatus, and a foldable electronic device. The hinge apparatus includes a base, a first hinge assembly, and a second hinge assembly. A compensation mechanism of each hinge assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. Concentric portions of all the connecting rods are rotatably connected to each other. The concentric portions of all the connecting rods rotate around a third axis relative to the base. A rotating portion of the second connecting rod rotates around a first axis relative to the base under driving of a main swing arm and drives the concentric portions of all the connecting rods to rotate around the third axis relative to the base. A movable plate and the third connecting rod rotate relative to each other around a fourth axis.