- Mar 4 Knut Ångström, Swedish physicist (b. 1857)
- Mar 10 Carl Reinecke, German pianist, composer and teacher (Undine Sonata), dies at 85
- Mar 10 Karl Lueger, Austrian politician, cofounder and leader of the Austrian Christian Social Party, dies at 65
- Mar 17 Joaquin Valverde Durán, Spanish composer, dies at 64
- Mar 20 James Hogan, Irish College Football Hall of Fame tackle (Yale), dies of Bright's disease at 37
- Mar 20 Nadar [Félix Tournachon], French photographer and balloonist, took the first aerial photograph, dies at 89
- Mar 24 Galen Clark, Canadian-born American naturalist and conservationist (discovered and helped preserve Mariposa's Grove of giant Sequoia trees), dies at 95 [1]
- Mar 26 An Jung-geun, Korean independence activist and assassin of Japanese Prime Minister Ito Hirobumi, executed by Japanese authorities at 30
- Mar 26 Auguste Charlois, French astronomer (b. 1864)
- Mar 27 Alexander Agassiz, American biologist and geologist, dies at 74
- Mar 27 David Duffle Wood, American blind composer (organist and choir master at St. Stephen's Episcopal Church), dies at 72
- Mar 28 David Josiah Brewer, U.S. Supreme Court Justice (b. 1837)
- Mar 28 Édouard Colonne, French violinist and conductor, dies at 71
- Mar 28 William Paul Roberts, Brigadier General (Confederate Army), dies at 68
- Mar 29 Thomas Lafayette Rosser, American Major General (Confederate Army), dies at 73
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning