Get an OS map, and there's a field called 'long field' between two lanes going toward farm buildings. Pull off the lane that runs parallel with the Cashel River. Park in this field through the (hopefully open) gate at 405266. And walk up the field, it's a long field (duh!) and stretches towards the field in which the stones are. When you get to the top of 'long Field' keep walking. The stones appear on the left.
Well worth the trouble, and it's not that far a walk. . honest!
Two stones, no more than 3 foot high nestle by a hedge. Dig a bit in the undergrowth and you'll find a third. It's right by the road, so if you want to 'up' your stone circle count. . it's easy to find.