Where Clause in Cloud System

I used this - IN ('value1','Value2','Value3') - using the Is(where clause) option for a field rule when creating a list in a DW Cloud system. The client throws a string parsing error when I try to open the list. I have used this successfully back in the admin tool days. Can anyone say what the correct way would be?

Many thanks,

Steve,
use the following syntax (OR must be in capitals).
Value1 OR Value2 OR Value3