Don't know without a few more clues. But it (they?) certainly was (were) hungry!

How long between the current "leafless" state and the previous time you looked at it? Do you see any droppings from caterpillars?

this happened within a couple of weeks.....whatever it is....its hiding pretty good......placed tangle foot around the trees and snail bait......looked for grasshoppers......aghhhhhhh cant seem to pinpoint the critteer......on this particular rose I took it from the container and checked the roots and soil but just a earwig .....any help is greatly appreciated....my dwarf fruit trees are next on his list......he already started....gonna try neem oil and maybe a hot mix of chilli pepper...

oh my goodness!!! that is awful. i've been having a lot of problems with chewers this year too, but this is incredible!