It there is the F3 fault code on the display, there must be a leak in the bottom section of your dishwasher. When the base tray is full, the system activates the flood switch and shows the code.
Pull out the dishwasher and tilt it backwards until the water drains completely. Use a tray or bucket. Also, it is advisable to prepare a towel.
The flood switch will return to its initial position, and the error will disappear. Hopefully, it is a one-off thing. Please, be careful: if it happens again, there is a leak, so you need a closer examination and maybe professional help.