| Unit Name: | 3rd Corps |
| Dates: | 1 December 1992 – 1995 |
| Allegiance: | Army of the Republic of Bosnia and Herzegovina |
| Garrison: | Zenica |
| Branch: | Regular Army |
| Type: | Motorized, Mountain and Infantry |
| Role: | Defence of Zenica |
| Size: | 34,500–40,500 |
| Colors: | Green and yellow |
| Notable Commanders: | Enver Hadžihasanović Mehmed Alagić Kadir Jusić Sakib Mahmuljin |
| Identification Symbol Label: | 5th Corps patch |
The 3rd Corps of the Army of the Republic of Bosnia and Herzegovina was one of five (later 7) corps that comprised the Army of the Republic of Bosnia and Herzegovina. It was established by the order of the Commander of Main Staff of the Bosnian Army Sefer Halilović on 9 November 1992 under Alija Izetbegović. This Corps was formed to unite the rest of the Territorial Defence Force of the Republic of Bosnia and Hercegovina and some Bosnian Special Forces and Civilian Forces.
The operational zone for the 3rd Corps were the districts of : Banja Luka, Bosanska Dubica, Bosanska Gradiška, Breza, Bugojno, Busovača, Čelinac, Donji Vakuf, Gornji Vakuf, Jajce, Kakanj, Kotor Varoš, Kupres, Laktaši, Mrkonjić Grad, Novi Travnik, Prnjavor, Skender Vakuf, Srbac, Šipovo, Travnik, Vitez, Zavidovići, Zenica and Žepče. Because of the fighting, there was a quick change in the territory and Vareš was included.
The Headquarters of the 3rd Corps was in Zenica. It was composed of a number of centers:
In February 1993, four operational groups were created under the command of Enver Hadžihasanović, the goal was to connect the 3rd Corps forces on the battlefield and the 3rd Corps Command:
Operational group Bosanska Krajina
Operational group Lašva
Operational group Bosnia
Operational group West
These brigades were under the direct command of the 3rd Corps Command.