What is a reason for receiving a yellow card failure no. 3 for squat?

Receiving a yellow card for squat failure no. 3 can occur when a lifter steps forward after the squat command. This is a clear indication of a lift not meeting the necessary technical standards set forth for the squat. The squat command requires that the lifter remains in a stable position, and stepping forward can disrupt balance and the intended execution of the lift.

Adherence to commands and stabilization during the squat is crucial for ensuring proper technique and safety. Straying from the established lifting zone, such as stepping forward, has implications for both the lifter's safety and the integrity of the competition. In a competitive environment, maintaining the criteria set by the referees is key to a successful lift.

While the other options deal with aspects of form and positioning, they do not specifically address the immediate violation linked with the command issued during the lift. Therefore, stepping forward after the squat command is a definitive reason for receiving a yellow card failure no. 3.