Yes, you can skip "Star Wars: The Clone Wars" movie and still enjoy Season 3 of the series. The movie serves as an introduction to the characters and the show's premise but isn't essential for understanding the storyline in the subsequent seasons. Season 3 picks up with ongoing plots and character development, so you won't miss crucial information by starting directly with the series. However, watching the movie may enhance your appreciation of the characters and their arcs.

"Star Wars: Clone Wars," the animated series that aired from 2003 to 2005, was canceled primarily due to the transition to a new animated series, "Star Wars: The Clone Wars," which premiered in 2008. The latter series aimed for a more in-depth exploration of the Clone Wars with a longer format, character development, and new story arcs. Additionally, the original series was intended as a limited run to bridge the gap between "Attack of the Clones" and "Revenge of the Sith," leading to its conclusion as planned.

Season 3 of "Star Wars: The Clone Wars" premiered on September 17, 2010, and concluded on April 8, 2011. This season continued to explore the events between "Attack of the Clones" and "Revenge of the Sith," featuring various story arcs that delve deeper into the characters and the ongoing conflict in the galaxy.

Yes, watching Season 7 of "Star Wars: The Clone Wars" before Episode III is recommended. Season 7 provides important context and character development leading up to the events of "Star Wars: Episode III – Revenge of the Sith." It explores key plot points, including the Siege of Mandalore, which enhances the emotional impact of the film and the fall of Anakin Skywalker. Watching it first will give you a deeper understanding of the characters and their motivations.