Here are the leaked the images of the upcoming “PENTAX K-3 Mark III”. It is expected to be announced in 2021. You can see from the pictures that the Pentax K-3 III body makes a big leap over the K-3 II.
The joystick on the back and the still and video switching dial on the top are different. Also, it seems that the GPS button on the left side of the penta part is gone. Check out the Pentax K-3 Mark III images below.