When it comes to whether or not you should be teeing a ball up on a par-3, it comes down to personal preference. There are a couple of factors that come into play and questions that you need to ask yourself to decide what option is best for you.
First of all, assess the lie and the type of grass you’re playing on. Is it a spongy grass, like Bermuda, that allows the ball to sit up naturally? Is the conditioning of the course you’re playing good enough?
Teeing the ball up does a few things for you that hitting it off the deck otherwise wouldn’t. Obviously, the ball gets raised up off of the ground a bit, which allows us to deliver the sweet spot a little higher than we would need to were the ball sitting on the ground.
In the end, it comes down to each individual and how they feel most comfortable hitting the shot. If you prefer playing from the ground with a perfect lie, by all means, forego the tee, but if you’re happy to give yourself a little more room for error, a tee might be a better option.