VIBURNUM PEST

We need a description of the symptoms or a photograph of the affected plant, but here's a guess, a stab in the dark - if its Viburnum tinus and its covered in small holes and looking a bit sick, its probably viburnum beetle. It does affect other Viburnums too, but V. tinus is the most susceptible. It's too late to treat it effectively this year because the beetles will have already hatched out, the best time is spring, when the larvae are present. Bug Clear Ultra is an effective spray treatment at that time, more information here, copy and paste into your browser

https://www.rhs.org.uk/advice/profile?PID=556

If the symptoms you're seeing don't fit with this problem, then you need to post more information or a photo please.

I had this problem year after year.I tried every remedy going but with no success.In the end I cut it completely down but even the tiniest new growth was infected.Sadly I have conceded defeat.

The trick is to spray with the right product at the right time of year. I treated three V. tinus spring before last in three different gardens, and all are doing very well, no problems at all this year, though I continue to keep an eye on them.