- Mar 1 Stefan Lindqvist, Swedish soccer midfielder (5 caps; IFK Göteborg), dies from Amyotrophic lateral sclerosis at 52
- Mar 4 Robert Shavlakadze, Georgian athlete (Olympic gold USSR high jump 1960), dies at 86
- Mar 5 Antonio Permunian, Swiss soccer goalkeeper (11 caps; AC Bellinzona, FC Luzern), dies at 89
Henri Richard (1936-2020)
Mar 6 Canadian Hockey Hall of Fame center (record 11 Stanley Cups; 9 x NHL All Star; Montreal Canadiens), dies from Alzheimer's disease at 84
- Mar 7 Matthew Watkins, Welsh rugby union centre (18 caps; Newport, Llanelli Scarlets), dies from pelvic cancer at 41
- Mar 13 Dana Zátopková, Czech athlete (Olympic gold women's javelin 1952, silver 1960), dies at 97
- Mar 17 Roger Mayweather, American boxer (WBA & lineal super featherweight title 1983-84, WBC light welterweight 1987-89; IBO light welterweight; IBO welterweight 1994-95), dies at 58
- Mar 20 Borislav Stanković, Serbian Basketball Hall of Fame administrator (International Basketball Federation secretary general 1976-2002), dies at 94
- Mar 23 Branko Cikatić, Croatian kickboxer (first K-1 World Grand Prix Heavyweight C'ship 1993), dies from Parkinson's disease at 65
- Mar 24 Ignacio Trelles, Mexican soccer midfielder (Mexican Primera División: 1935, 37, 38; Club Necaxa) and coach (Mexico 1960-69), dies at 103
- Mar 24 John Davies, Australian swimmer (Olympic gold 200m breaststroke 1952; WR 200m breaststroke 2:34.4 1952), dies at 90
- Mar 24 Tony Rutter, British motorcycle road racer (Formula Two World C'ship 1981-84; 7 x Isle of Man TT Races), dies at 78
- Mar 25 Bill Bartholomay, American businessman and MLB owner (Milwaukee/Atlanta Braves 1962-76), dies from pneumonia at 71
- Mar 25 Mike Stratton, American football linebacker (AFL C'ship 1964, 65; AFL All-Star 1963–68; Buffalo Bills; NFL: SD Chargers), dies from heart complications at 78
- Mar 25 Peter Kemper, Dutch soccer defender (3 caps; PSV 221 games), dies of heart failure at 77
- Mar 26 Curly Neal, American basketball guard (Harlem Globetrotters 1963-85), dies at 77
- Mar 26 Jimmy Wynn, American baseball outfielder (MLB All Star 1967, 74, 75; Houston Colt 45s/Astros, LA Dodgers), dies at 78
- Mar 26 John O'Leary, Irish golfer (Irish Open 1982; Ryder Cup 1975; director European Tour 1985-2019), dies at 70
- Mar 26 Michel Hidalgo, French soccer midfielder (1 cap; Monaco) and manager (France 1976-84; UEFA Euro 1984), dies at 87
- Mar 27 Frank Myler, English rugby league stand-off (24 caps Great Britain, 1 England; Widnes, St. Helens) and coach (Widnes, Swinton, Oldham), dies at 81
- Mar 27 Les Hunter, American basketball center (NCAA C'ship 1963, Loyola Ramblers; NBA: Baltimore Bullets; ABA All Star 1968, 69; Miami Floridians), dies from cancer at 77
- Mar 29 Jim Lambright, American college football coach (University of Washington 1993-98; 44–25–1 record), dies from complications of dementia at 77
- Mar 29 José Luis Capón, Spanish soccer defender (13 caps; Atlético Madrid, 200 games), dies of COVID-19 at 72
- Mar 30 Frank Maloney, American football coach (Syracuse University 1974-1980), dies from brain cancer at 79
- Mar 31 Jeff Grosso, American skateboarder (host Youtube’s 'Vans Loveletters to Skateboarding'), dies at 51
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