The first pic seems like fertilizer burn & under watering . The second pic looks like a soil drainage problem , or over watering .

Would rosetone and fish fertalizer cause this type of burn?

Before applying any type of fertilizer ,the rose needs to be watered the day before and again after fertilizing .

Indeed yes. As Pink Rose wrote, never liquid feed a rose that is not fully hydrated, usually meaning a good watering no earlier than a day before the liquid feeding. Then right after the feeding a light watering is needed. Get the foliage wet with fresh water also, after the feeding. Try to do this all before 5:00 PM, so that the foliage is dry by sunset.

Never liquid feed in full sun on a hot day no matter how hydrated your roses are. Foliage splashed with th feeding will surely burn.

The yellow markings on the foliage does look like water stressed roots. However, there's a chance the rose is virused with Mosaic Virus, but time will tell. Either way, hold off watering if it's over watering or the rose could die. Roots are extremely sensitive to root rot. The yellowed leaves will continue to get more yellow and fall off if it was over watering.

Moses