Answer: Based on your description I am not certain what is happening to your barberries. It is possible that there is a root problem where they have encircling roots below ground that now are beginning to basically strangle the plant causing stunting and dieback. It is also possible there is a disease problem such as verticillium wilt -- the symptoms sound as though it may be this. I would suggest you work with your local county extension to obtain a specific diagnosis and then wotk from there. I'm sorry about your barberries.
Q&A Library Searching Tips