The 3rd division was the main component of the Finnish III Corps. During the war, the division fought mosly in the Uhtua and Kiestinki area. When the Soviet main attack began in 1944 the division was transferred to the Karelian Isthmus.
During the Lapland War against Germany in 1944, the division made a landing in Tornio. The division advanced to Rovaniemi and from there northwards to Muonio where it was disbanded.