Here’s the latest Tesla Model 3 manual as of Software 2021.44:
I’m not seeing a .pdf version. Hope there is one as I like to keep it saved on my phone should I not have an internet connection.
If you are waiting for your car to be delivered, you can get a bit more up to speed on the car and it’s features by reading through the Model 3 Manual in the meantime.
Not sure if Tesla changes web addresses...