- Mar 3 Antonin Artaud, French songwriter and director (Theatre Seraphin), dies at 51
- Mar 4 Antonin Artaud, French poet/actor (Napoleon), dies at 51
- Mar 5 Charles Prince, cricketer (5 & 1 in only Test for South Africa), dies
- Mar 6 Ross Lockridge, Jr., American novelist (Raintree County), dies at 33
- Mar 8 Emily Bissell, American welfare worker and founder of Christmas Seals, dies at 86
- Mar 10 Jan Masaryk, Czech statesman and Minister to London (1918-35), commits suicide or is murdered at 61
- Mar 10 Zelda Fitzgerald [née Sayre], American writer (This Side of Paradise) and wife of writer F. Scott Fitzgerald, dies at 47
- Mar 13 Princess Helena Victoria of Schleswig-Holstein, granddaughter of Queen Victoria of the U.K., dies at 77
- Mar 24 Sigrid Hjertén, Swedish modernist painter, dies at 62
- Mar 25 Warren Hymer, American actor (Girl From Havana, Meet the Mob), dies from a stomach ailment at 42
- Mar 26 Helen Ernst, German poster artist/resistance fighter, dies at about 43
- Mar 27 Karel Candael, Flemish composer, dies at 64
- Mar 28 Princess Henriette, Duchess of Vendôme and Alençon, dies at 77
- Mar 29 Olev Siinmaa, Estonian 'Functionalist' architect (Pärnu Beach Hotel), dies at 66
- Mar 31 Egon Kisch, Austrian-Czech writer and journalist (Raging Reporter), dies at 62
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning