My car beeps 3 times everytime I turn car on and off It is not the horn sound

Hello, it sounds like there may be an aftermarket device like an alarm or GPS unit attached to wiring underneath your dash. That is just a guess, but it seems like this is not a normal factory sound to be happening. You may want to get a professional pair of eyes to have a look and see what's going on and what might be present under the dash. https://repairpal.com/auto-repair-near-me