Bathhouse No. 3 is a Bolgar city bathhouse. It was built of brick and stone in the second half of the XIV century. Only separate portions of the southern and western wall masonry and limestone slab floor supports have remained intact. Brickwork is represented by three-layer double-faced variously shaped limestone blocks. The square bordering the bathhouse at the south-eastern side was clad with flagstones.
The structure is dimensioned 15×12 m. the building envelope consists of two variously dimensioned rooms rectangular in plan. The central section included a central hall cruciform in plan and four bath sections. The northern room represented a heating chamber with an oval stove dimensioned 1.2×1.8m.