11/3
# 11/3

11/3 may refer to:

* November 3 (month-day date notation)
* March 11 (day-month date notation)
* 11 shillings and 3 pence in UK predecimal currency
* A type of hendecagram
* 2004 Madrid train bombings
* 2011 Tōhoku earthquake and tsunami
   * Fukushima Daiichi nuclear disaster, caused by the earthquake and tsunami
