August 3 is the 215th day of the year (216th in leap years), with 150 days remaining.
- 1875 — Joseph Riaud is apprehended.
- 1932 — Petros Koulaxidis died.
- 1949 — Leslie Burchart is born.
- 1957 — Francisco del Junco is born.
- 1959 — Dellmus Colvin is born.
- 1974 — Mei Leung (victim) is born.
- 1984 — Franz Schmidt is apprehended.
- 1993 — Charles Wooten is apprehended.
- 1995 — Vladimir Krishtopa is apprehended.
- 2006 — Dale Hausner and Samuel Dieteman ("Phoenix Serial Shooter") are apprehended.
- 2011 — Eliakim Nampindi is apprehended.
- 2023 — James Phillip Barnes died.