Looks dead, or close to it.

Scratch the bark, is there any green underneath?

your soil is dense and probably killing it. You need to switch to 5-1-1 or gritty if it's still alive. If you start over use what I suggested or you will have more problems.

dead.

The bark is still green.

You're scratching the rootstock, try scratching the scion above that graft line. Get rid of the rocks near the trunk, do what pip said and get the tree into gritty mix or 5-1-1 mix. Might still be salvageable.

Evan

What's that bottle in the pot? Is that Neem Oil?

All good info. Also, don't let the water stay in the outer pot. You have to empty it.

I'm lazy sometimes and don't drain the water to the saucer. An alternative is to put pieces of wood under the pot and raise the container. But you would have to trade the pot for a saucer.