Same old same old since #2. Woody needs to make a kid happy. Another toy is in trouble. Woody struggles to help that toy & also the kid. Buzz, etc help when Woody needs them.
Well, somewhat different in this one is that Woody always needs to be told what to do & when to do it by Bo Peep. This is not surprising given Hollywood's current need to portray women as strong & noble and men as weak & nasty.
And then there is Gabby, who is alternately sweet(ish) & evil. The only thing more creepy than Gabby are her accomplices. How/why did they decide to make Creepy Story with main themes being emancipation and emasculation?