Amastra vetusta is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.

The shell is minutely rimate, oblong-conic, and relatively thick and solid.

The initial half-whorl is smooth, followed by two embryonic whorls finely sculptured with deeply engraved, slightly arched longitudinal striae.

Subsequent whorls are more coarsely sculptured with prominent, closely spaced longitudinal wrinkles intersected by a few irregularly placed spiral lines, as if etched on a softer surface.

Amastra vetusta exhibits the characteristic shell thickening and coarse sculpture commonly observed in land snails inhabiting arid environments with minimal shade or cover.