- Mar 1 Jacobus Henricus van 't Hoff, Dutch chemist and physicist (Nobel 1901), dies at 58
- Mar 7 Antonio Fogazzarro, Italian writer and poet (Il Santo, Leila), dies at 68
- Mar 13 Jacob Maarten van Bemmelen, Dutch physicist and chemist, dies at 80
- Mar 13 John J. Toffey, American Civil War Medal of Honor Recipient (b. 1844)
- Mar 20 Jean-Theodore Radoux, Belgian composer, dies at 75
- Mar 24 Stanley Robison, American civil engineer, streetcar magnate, and baseball team owner (Cleveland Spiders, 1887-99; St. Louis Cardinals, 1899-1911), dies from complications of locomotor ataxia at 56
- Mar 29 Alexandre Guilmant, French organist (La Trinitié, 1871-901), composer and pedagogue (Schola Cantorum, 1894-1911), dies at 74
- Mar 30 Ellen Henrietta Richards, American chemist (Amer Home Economics Association-1st Pres), dies at 68
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning