3

Year 3 was a (link will display the full calendar) of the.

Roman Empire

 * The rule of is renewed for a ten-year period.
 * Augustus adopts his grandson,, with the expectation that he will succeed him. Gaius is made proconsul and is sent on a special mission to the East.
 * and are s of.

Europe

 * Menneas becomes.
 * Five German tribes are unified by, King of the Marcomanni. The unification of the five tribes represents a direct threat to  in the area that will become  and.

China

 * foils a plot by his son, Wang Yu, his brother-in-law, Lu Kuan, and the Wei clan to oust him from the regent's position. Wang Yu and Lu Kuan are killed in the purge that follows.

Births

 * , Chinese historian (d. )
 * (see ) (d. c. )