| 100321 | September 3 | Death | 1766 – Archibald Bower, Scottish historian and author (b. 1686) |
| 100322 | September 3 | Death | 1808 – John Montgomery, American merchant and politician (b. 1722) |
| 100323 | September 3 | Death | 1857 – John McLoughlin, Canadian-American businessman (b. 1784) |
| 100324 | September 3 | Death | 1866 – Konstantin Flavitsky, Russian painter (b. 1830) |
| 100325 | September 3 | Death | 1877 – Adolphe Thiers, French historian and politician, 2nd President of France (b. 1797) |
| 100326 | September 3 | Death | 1883 – Ivan Turgenev, Russian author and playwright (b. 1818) |
| 100327 | September 3 | Death | 1886 – William W. Snow, American lawyer and politician (b. 1812) |
| 100328 | September 3 | Death | 1893 – James Harrison, Scottish-Australian engineer, journalist, and politician (b. 1816) |
| 100329 | September 3 | Death | 1906 – Mihály Kolossa, Hungarian author and poet (b. 1846) |
| 100330 | September 3 | Death | 1914 – Albéric Magnard, French composer and educator (b. 1865) |
| 100331 | September 3 | Death | 1929 – John Bigham, 1st Viscount Mersey, English jurist and politician (b. 1840) |
| 100332 | September 3 | Death | 1936 – Nikita Balieff, Armenian-Russian puppeteer and director (b. 1876) |
| 100333 | September 3 | Death | 1942 – Will James, Canadian-American author and illustrator (b. 1892) |
| 100334 | September 3 | Death | 1944 – John Lumsden, Irish physician, founded the St. John Ambulance Brigade of Ireland (b. 1869) |
| 100335 | September 3 | Death | 1948 – Edvard Beneš, Czech academic and politician, 2nd President of Czechoslovakia (b. 1884) |
| 100336 | September 3 | Death | 1954 – Marika Kotopouli, Greek actress (b. 1887) |
| 100337 | September 3 | Death | 1961 – Robert E. Gross, American businessman (b. 1897) |
| 100338 | September 3 | Death | 1962 – E. E. Cummings, American author, poet, and playwright (b. 1894) |
| 100339 | September 3 | Death | 1963 – Louis MacNeice, Irish poet and playwright (b. 1907) |
| 100340 | September 3 | Death | 1967 – Francis Ouimet, American golfer and banker (b. 1893) |
| 100341 | September 3 | Death | 1968 – Isabel Withers, American actress (b. 1896) |
| 100342 | September 3 | Death | 1969 – John Lester, American cricketer and soccer player (b. 1871) |
| 100343 | September 3 | Death | 1970 – Vince Lombardi, American football player and coach (b. 1913) |
| 100344 | September 3 | Death | 1970 – Alan Wilson, American singer-songwriter and guitarist (Canned Heat) (b. 1943) |
| 100345 | September 3 | Death | 1974 – Harry Partch, American composer and theorist (b. 1901) |
| 100346 | September 3 | Death | 1978 – Karin Molander, Swedish actress (b. 1889) |
| 100347 | September 3 | Death | 1980 – Barbara O'Neil, American actress (b. 1910) |
| 100348 | September 3 | Death | 1980 – Dirch Passer, Danish actor, singer, and producer (b. 1926) |
| 100349 | September 3 | Death | 1980 – Duncan Renaldo, Romanian-American actor, producer, and screenwriter (b. 1904) |
| 100350 | September 3 | Death | 1981 – Alec Waugh, English soldier and author (b. 1898) |