Portal:Australia/Anniversaries/April/April 3
- 1848 – Explorer Ludwig Leichhardt was last seen on the Darling Downs.
- 1954 – Vladimir Petrov, a Soviet diplomat, defects to Australia, sparking the Petrov Affair.
- 1969 – Actor Ben Mendelsohn is born.
- 1982 – After almost 27 years in power, the Liberal/National coalition government is voted out in Victoria and replaced by the ALP.