Answer: Some Japanese maples are more susceptible to sunscald than others. Without knowing exactly which maple you have, it's difficult for me to say whether or not the crispy leaves are due to overexposure to sunshine. Generally, the filagree leafed maples are more tender than the larger leafed trees. I wouldn't prune the branch right now. It's the end of the growing season and your tree will drop the leaves within a few weeks. New leaves will be produced in the spring. If your tree develops crispy leaves next summer, you might want to move it to a more protected site - one that provides shade from the hot afternoon sunshine.
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