The Panzer III A through C had 15 mm of slightly sloped homogeneous steel armor on all sides, with 10 mm on the top and 5 mm on the bottom.

• III号坦克A型到C型在四周都装有15毫米略为倾斜的均质钢装甲，顶部和尾部分别是10毫米和5毫米的装甲。