The following are events related to the Global War On Terrorism (GWOT) that took place on this day.

2004

• End of Battle of Samarra in Iraq

2007

• Start of Operation Hawaii II in Iraq

2009

• Clinton Romesha, Army, Staff Sergeant, is the recipient of the Congressional Medal of Honor for his actions on October 3, 2009.
• Ty Carter, Army, Staff Sergeant, is the recipient of the Congressional Medal of Honor for his actions on October 3, 2009.

Casualties on October 03:

• KIMBROUGH, PAUL WAYNE – October 3, 2003
• SIMS, CHARLES MARQUES – October 3, 2003
• COLLIER, RUSSELL LEE JR – October 3, 2004
• PETTAWAY, JAMES LEE JR – October 3, 2004
• POTTS, CHRISTOPHER SCOTT – October 3, 2004
• BERRY, SEAN BRADY – October 3, 2005
• PANKEY, LARRY WAYNE JR – October 3, 2005
• STALVEY, JOHN ROBERT – October 3, 2005
• ROBINSON, FERNANDO DANIEL – October 3, 2006
• VACCARO, ANGELO JOSEPH – October 3, 2006
• ISSHAK, DANIEL – October 3, 2006
• ROJAS, JONATHAN – October 3, 2006
• GALLEGOS, JUSTIN TIMOTHY – October 3, 2009
• GRIFFIN, CHRISTOPHER TODD – October 3, 2009
• HARDT, JOSHUA MITCHELL – October 3, 2009
• KIRK, JOSHUA JOHN – October 3, 2009
• MACE, STEPHAN LEE – October 3, 2009
• MARTIN, VERNON WILLIAM – October 3, 2009
• RABJOHN, THOMAS DUANE – October 3, 2009
• SCUSA, MICHAEL PATRICK – October 3, 2009
• THOMSON, KEVIN CHRISTOPHER – October 3, 2009
• PEDRO, BRIAN JOSEPH – October 3, 2010
• CHEN, DANNY – October 3, 2011
• STEEDLEY, CAMELLA MARCHETT – October 3, 2012