CT3 or CT-3 may refer to:
- Chris Taylor (baseball) (born 1990), American baseball player
- Connecticut's 3rd congressional district
- Connecticut Route 3, state route
- Crazy Taxi 3: High Roller
- CT-3 needle for surgical suturing
- CT3 (MBTA bus)
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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