It could be rose midge. Also, maybe the pot is too small. Cannot tell from your picture, but they should not be kept indoor

I hope your rose will leaf out again when it is cooler.

Place your rose outside where it will be in the afternoon shade. Keep the soil damp, but not wet and the rose will grow another set of leaves. Roses are capable of growing three sets of leaves before it effects their vigour. Because it is a young rose, perhaps cutting it back a little will help the new roots push out new growth. The rose won't die, it is just under stress. Don't fertilize when it is hot, wait until there is a cooling down and then just give it fish fertilizer every ten days at half the strength. This is like chicken soup to a rose!!