- Mar 2 Gustav Wohlgemuth, German composer, dies at 73
- Mar 6 Frank Vosper, British actor (The Man Who Knew Too Much, Rome Express), dies at sea at 37
- Mar 8 Albert Verwey, Dutch poet/literature historian (Motion), dies at 71
Howie Morenz
Mar 8 Howie Morenz, Canadian Hockey Hall of Fame center (Montreal Canadiens, 3-time Stanley Cup winner), dies of a heart attack at 34
Howie Morenz
- Mar 9 Paul Elmer More, American critic and essayist, dies at 72
- Mar 10 Yevgeny Zamyatin, Russian writer (b. 1884)
- Mar 11 Paul Scheinpflug, composer, dies at 61
- Mar 11 Joseph S. Cullinan, American oil industrialist (b. 1860)
- Mar 12 Jeno Hubay, Hungarian composer, dies at 78
- Mar 12 Charles-Marie Widor, French organist, composer and professor (Paris Conservatory), dies at 93
- Mar 15 H. P. Lovecraft, American horror writer (At the Mountains of Madness, Weird Tales), dies at 46
- Mar 16 J Austen Chamberlain, English Minister of Foreign Affairs (Nobel), dies at 73
- Mar 18 Charles Haslewood Shannon, English lithographer and painter, dies at 73
- Mar 19 Horacio Quiroga, Uruguayan playwright, poet, and short story writer (Anaconda, El Crimen del Otro), commits suicide at 58
- Mar 20 Harry Vardon, Jersey golfer (6 time British Open champion, US Open 1900), dies of lung cancer at 66
- Mar 22 Mary Russell, Duchess of Bedford, English aviator and ornithologist, dies at 71
- Mar 23 Helge Rode, Danish poet/essayist, dies at 66
- Mar 25 John Drinkwater, English poet/playwright (Bird in Hand), dies at 54
- Mar 26 Albert Relf, English cricketer (13 Tests for England 1903-14), commits suicide at 52
- Mar 29 Karol Szymanowski, Polish/Ukraine composer (Stabat Mater), dies at 54