Life Regiment Grenadiers, also I 3, was a Swedish Army infantry unit that was active in various forms 1815–2000. The unit was based in Örebro Garrison in Örebro and belonged to the King's Life and Household Troops until 1974.

Colonel Friherre Axel Walfrid Carl Gyllenkrok was a Swedish officer and sports shooter. Gyllenkrok commanded the 3rd Flying Corps (1932–1934) and Halland Regiment (1937–1938).