Catcher not returning ball to pitcher

[SRW]

Originally Posted by Dholloway1962

The batter is supposed to keep one foot in the batter's box between pitches, with a few exceptions. Losing track of the count is not an exception. On a 2-1 count, if the runner takes off for 1B on strike 2 (swinging on pitch in dirt), thinking it is a D3K, I have strike 3 and batter is out.

No you don't. Batter swung at the pitch. That's an exception to leaving the batter's box.
ASA 7.3(C-2)