When was The third Greek – Persian War

First, Second, Third wars are an unrealistic modern construct of some less-than-informed people.

The phases of the Persian War were:

Ionian Revolt 499-493 BCE.
Persian punitive expedition against Eretria and Athens 490 BCE.
Persian invasion of peninsular Greece 480-479 BCE.
Delian League battles with Persia 478-449 BCE.