How can I fill in the 3" gap between my stove and the wall?

I'm not sure I knew about it to tell you the truth, LOL! I just thought, if it was my kitchen, what would I want to do to try and fill in the space and my first answer was SHELF for extra storage. One could just use a shelf that screws into the wall somehow or other, but especially if you live in a rental place like I did for years (apartment living) you either don't want to or cannot do that per landlord rules. These shelf units that fit right over the back of a stove are perfect to give you easy access to salt/pepper/spices you use every day, for instance, perhaps some hot pads, glass steins holding utensils you use all the time so you don't have to go digging through a drawer, a napkin holder, a plant, flowers - whatever! And it can move with you if you move in the future. Hope you find just the right look, there are tons of options!