The Daewoo Precision Industries K3 is a South Korean light machine-gun. It is the third indigenous firearm developed in South Korea by the Agency for Defense Development, following the Daewoo Precision Industries K1 assault rifle and Daewoo Precision Industries K2 assault rifle. It is manufactured by Daewoo Precision Industries, current SNT Motiv. The K3 is capable of firing both 5.56×45mm NATO and .223 Remington rounds like the K2 assault rifle. The K3 light machine gun entered service in 1989, replacing the M60 machine gun in frontline use.

The Agency for Defense Development is the South Korean national agency for research and development in defense technology, funded by the Defense Acquisition Program Administration (DAPA). It was established in August 1970 under the banner of the self-reliant national defense promoted by President Park Chung Hee.