This is absolutely true, a guy said this to mean so I looked it up on the Switzerland DVLA equivalent website.
"The practical [driving] test can be taken only three times. If you fail it three times, you are required to consult a psychologist who will decide if you are mentally fit to drive and who can offer you a fourth and final attempt... But you would have to demonstrate a real inaptitude for driving to get to that point."
I mention this because in about an hours time, I have my third driving test, thankfully in the UK.
UPDATE: 15:15. I passed, fuck me!