Form III, also known as Soresu, the Way of the Mynock, or the Resilience Form, was the third of the seven classic forms of lightsaber combat that was recognized by the Jedi Council prior to and during the Clone Wars. Soresu was developed during the widespread emergence of blasters as an offensive weapon. Essentially a development on Form I blast-deflect training, Soresu relied on tight bladework and subtle dodges to provide maximum defensive coverage, minimizing exposure to ranged weaponry. Over time, Soresu transcended this basic origin, and came to be considered the ultimate expression of non-aggressive Jedi philosophy.

Like Makashi, Soresu relied on economy of motion and energy efficiency, keeping up constant blade movement to build up momentum and minimize energy expenditure. Form III focused on strong defensive technique to essentially outlast an opponent, waiting until they began making mistakes due to frustration or fatigue, before taking advantage of these lapses and countering. Despite its effectiveness, Soresu was heavily criticized for its lack of offensive capabilities, as it facilitated survival rather than victory. As an answer to these weaknesses, the highly aggressive Ataru and Shien forms were developed side by side.

Sora Bulq is theorized to have practiced Soresu, based on statements in the official Databank.

Soresu has also been included in several Star Wars games of various types. Examples include Star Wars Galaxies, where it is among moves and techniques employable by Jedi characters, though this has not definitively been declared canonical;^[26] or the Star Wars Miniatures game, where a player with a Soresu Style Mastery can roll to block all attacks that hit the character, though a character with the Makashi Style Mastery can avoid having their attacks blocked by this ability.