Squats are a race that were playable in first edition of Warhammer 40,000, but have since been removed. They were analogous to dwarves, being short abhumans from high-gravity worlds. They have since appeared on and off in canon, with the revised version of the novel Draco by Ian Watson claiming that their worlds were destroyed by the Tyranids. However, some squats are still alive, such as mercenaries featured in the board game Necromunda.
The canonicity of the Squats is played around with in If The Emperor Had a Text-To-Speech Device. Their ships were seen being eaten by Tyranids in the BEHEMOTH Trilogy, and they now only appear in the Retconnian alongside Malal and Horus' soul. The Emperor off-handedly remarked that he told Roboute Guilliman that he was not allowed to reinvent Squats.