| Unit Name: | Partisan 3rd Corps |
| Dates: | 1942–1945 |
| Country: | Democratic Federal Yugoslavia |
| Branch: | Yugoslav Partisan Army |
| Type: | Infantry |
| Size: | Corps |
| Command Structure: | Partisan 2nd Army |
| Battles: | World War II in Yugoslavia
|
| Notable Commanders: | Kosta Nađ Vladimir Popović |
The 3rd Corps (treći korpus) was a Yugoslav Partisan corps that fought against the Germans, Independent State of Croatia (NDH) and Chetniks in occupied Democratic Federal Yugoslavia during World War II. It was created in November 1942 as the 1st Bosnian Corps, and underwent a name change in 1943. It grew in size until 1 January 1945 when it was subordinated to the Partisan 2nd Army. The 3rd Corps spent most of 1944 engaged in hard fighting against the 13th Waffen Mountain Division of the SS Handschar (1st Croatian) in eastern Bosnia.