Donovan
As has been pointed out it is voltage that determines how many amps the motor will take. Note it is the motor that draws the amps out of the battery not the battery that forces the amps in.
If the motor load (the prop) and the rest of the electrics are designed to work on a 3s battery voltage then the battery can be as big as you like, as long as it is a 3s voltage, the motor will not draw any more amps but the weight of a big battery will likely mean the plane will not fly!
So you have to arrange that the load on the motor does not cause it to draw too many amps and over heat. Similarly you have to ensure the electronic speed controller (ESC) can handle both battery voltage and the max amps the motor will draw. Then finally you have to ensure the battery has the capability to deliver the max amps without damaging itself and all for a weight that allows the plane to fly with using the motor power available.
There is no single right solution it is always a compromise to best suit your objectives.
You can make an electric plane that can fly for hours or one that can take off vertically but not (yet!) do both at the same time!