Guessing Game.

Ok so I would offer a prize if I could, but just for fun see if you can tell me what has happened to this plant and in a couple of days I'll let you know what's up. By the way the plant is 3 month old.

Nute Burn
Major PH Problem
& Simple Neglect.

^^^^^^^^^^ what he said, plus it looks like you burnt the shit out of it, lok at those leaves blanching....Damn, not good, not good at all......

what they said. you leave that for 1-3 more days and shes gone man

You Seem to suck at life when it comes to growing cannabis

Mud Butt... Check the bottom of that pot....for stank toxic shit.
"Root Rot"
Yes, you need to pop the plant out to check.
If it is, shake off most of the soil and transplant into new soil.