This is a virus that is only spread via plant material, usually by an infected plant being used as budwood. It does not spread in a normal garden situation but to be safe disinfect your pruning tools after using on this plant. It will not harm your plant or stop it producing flowers but will cause the leaves have a yellow pattern. Plants will still function normally.
No treatment available - this will not harm your roses.
Important: signs and symptoms will vary significantly between varieties, even within similar categories. The information provided here is a basic summery of the most common affects and will not always be applicable to all rose varieties.