IA3 or similar may refer to:
- Ice Age: Dawn of the Dinosaurs, a 2009 3-D computer-animated adventure comedy film
- Iowa Highway 3, a state highway that runs from east to west across the state of Iowa
- Iowa's 3rd congressional district, a congressional district in the U.S. state of Iowa
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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