| Japanese Third Army | |
|---|---|
&sq=Envato&lang=en&file=File:Japanese_11_inch_siege_gun_shells_Port_Stanley_1904.jpg) IJA 3rd Army at Port Arthur, 1904 | |
| Active | May 1904-August 1945 |
| Country |  Empire of Japan |
| Branch |  Imperial Japanese Army |
| Type | Infantry |
| Role | Corps |
| Garrison/HQ | Yanji, Manchukuo |
| Nickname(s) | Iwa (岩, rock) |
| Engagements | Russo-Japanese War Soviet invasion of Manchuria |
The Japanese 3rd Army (第3軍, Dai-san gun) was an army of the Imperial Japanese Army based in Manchukuo as a garrison force under the overall command of the Kwantung Army during World War II, but its history dates to the Russo-Japanese War.