I have two switches at the bottom of my stairs in the basement. One switch is a three way to the switch at the top of my stairs. The other switch lights a series of lights all connected to the same circuit. One of those lights is in the pantry and what I would like to do is isolate that light from the rest by adding a single pole switch to the room. The switch at the bottom of the stairs would still light up the rest of the lights.
Based on the input by the contributors, I was able to make an informed decision. I passed a new cable down through the wall to the main switch box at the bottom of the stairs. I wired in the new wire and passed the wire across to the pantry room. I removed the wire from the fixture and tied those together in a junction box. I passed the new cable down to the new box and passed a new wire from the box to the existing electrical box. The fixture box is plastic and doesn't have a ground screw so I just capped it off with a wire nut. I wired the light and the switch without any issue.