Cercospora depazeoides is a fungus which attacks the leaves of Elder (Sambucus), creating a strange, pale, scale like appearance on the upper surface of the leaves, and tiny black spots beneath.
Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed.
Wherever Elder occurs.
Late summer and Autumn while Elder is in leaf.
Status in Britain is difficult to determine due to lack of records, but this species is believed to be fairly widespread.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015