This is a branch off about a ten year old generic acer palmatum I planted out in the yard. Generally the tree looks healthy as a multi trunk specimen even doing well through last year's record drought and heat. This year there are some bare twigs I blamed on a series of cold snaps after it leafed out. Now this year besides the usual pruning so I can mow around it, I have removed two branches on which all the leaves shriveled up and died. They were on different stems and this is the larger of the two. Maybe 4 foot or a bit over a meter long. The first was smaller and I removed it about a month ago. About 300 feet away I have a "fire" something or other coral bark cultivar which has never over wintered well. Perhaps the same month ago it lost it's .25 meter leader to a similar problem and otherwise looks healthy. This spring has been pretty wet but not to the point of being a record setting year. There were also them dips into the lower thirties so I blame the small bare stems on that. If this were the only branch I would say something got into the tree from that lowest pruning cut. (there was another six inches below that removed back to the branch collar as I did not want to remove it all at once.) However the other branch was one I did not prune near and I did not prune that small other tree. One other thing I did not do is wait to see if the shriveled death spread or if the branches releafed. Thanks for any tips.