From the picture it appears that the tree is kept indoors. If this tree is kept indoors all the time , that would explain leaf loss. when Elms are kept outside they lose their leaves in the fall as most deciduous trees do. But, when kept indoors the leave
s remain throughout the year. What happens is that eventually the older leaves turn yellow and fall off.
If this tree is kept indoors year round then I would think the tree is fine. It should be putting out new leaves shortly.
SteveW
Long Island NY

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