Which of the following is a typical sign of a grade 3 muscle tear?

A grade 3 muscle tear is characterized by a complete rupture of the muscle or ligament. This type of injury results in significant loss of function and is often accompanied by severe pain and swelling. A complete rupture means that the muscle fibers have been torn all the way through, which can lead to an inability to use the affected muscle effectively.

The other options reflect signs associated with lesser degrees of injury. For instance, moderate pain with swelling can indicate a grade 1 or grade 2 tear, rather than a complete rupture. Minor bruising that fades quickly typically corresponds to milder injuries too. Similarly, pain limited to movement often signifies a less severe injury where there's still some functional integrity to the muscle. Therefore, the sign that accurately represents a grade 3 muscle tear is the complete rupture of the muscle or ligament.