hard to say without more info.
Soil does look like it could be overwatered. Small plants require little water, especially when in large pots.
Also, it looks like you could have some nute burn. Are you feeding it? you probably dont need to at this stage in the game when you are using soil that is already amended.
We only see part of a leaf in the pic. What kind of nutes and soil are you using? how often have you been watering? This plant is outside right? Kinda late to be starting outside, unless you are in a different hemisphere than north America. You may want to bring a light outside to keep it vegging for a month or 2 more then let it flower. That is as long as you are somewhere that wont get hit by snow come november/december (a lot of places do, or get hit hard with a marine layer that molds everything, even then you can put up a cheap small green house with possibly a heater to keep everything kosher.)
Give us some more info and Im sure someone can get you on the right track.
Get a grow bible in the meantime and read around the farm a little, hopefully you will find answers to the questions you need to know. Good luck. It can be saved. I have brought back worse. Just try to keep it from flowering until it is stronger and bigger and you will get a decent yield.