A Shield-Bug Nymph
It think this is Pentatoma rufipes. The nymphs of several species are quite similar. It stayed on this leaf, mostly keeping still and occasionally changing its orientation.
Olympus EM-1 (aperture priority), Olympus 4/3 x2 TC, Olympus 4/3 50mm f2 macro, f11, hand-held.
The stereos are crosseye.