KItten stopped eating?

Titan is 3 months old. Last night I left for work and nobody gave him his food so when I got home I gave him half a can of his wet food which is 1.5 oz mixed with his kibble. I normally give him 3 oz divided into 4 meals or 3. He ate it all amd after his tummy was big. Today when I woke up I tried feeding him but he wouldn't eat I just got home from work and he still won't eat? I'm really worried. Also he had diarreah in the morning. What could be causing this? Could it he that he is full or something?

He should definitely not still be full at this point, no.  Is it the same food you always give him? Have you tried warming it up so it will smell more enticing?

The bottom line is, unfortunately, that if he has gone without eating for 24 hours or nearly that, this is a very serious situation. This is especially true because of his age, but is also true because of something called fatty liver syndrome  No cat should go more than 24 hours without food.

Honestly, I myself would take a kitten that young to the vet if he still won't eat after you warm up some food.  If you want to try something else first, you can try force feeding him with a syringe or dropper, and if that is something you are interested in we can provide more detailed instructions.

Has he been exhibiting any other weird behaviors at all other than the diarrhea? Is he still interested in playing? is he sleeping more than usual? Does he seem to be drinking water as usual?

Everything else is good, he seems to be acting normal as usual. Just last night he didn't get all hyper like he usually does.
Yes its the same food and I usually warm it up with hot water so it wont be so cold. I am going to try feeding him right now and hopefully (fingers crossed) he eats on his own.

Good news! He is eating as I'm writing this. I'm so relieved!