It's body looks like a bee, but it's smooth (hairlessness) yellow and black coloration scream wasp. Found "sleeping"/sunning on leaf of Himalayan Blackberry, Rubus armeniacum. I found one in a similar position in a neighboring branch yesterday. When "sleeping" it held it's antennae together straight out and was holding onto a leaf with it's mandibles, like some of the bees I've seen photographs of.