Hide the ribbon button

Hi folks,

I have to hide a ribbon button which is in "A" entity. In A table form there is a lookup of "B" table when ever we select the record in lookup, that record should have data in one of its 'C' subgrid which is placed under a "D" tab in "B" table record.

Note: Ribbon button is added through the PowerApps. Can I use the powerFx formula's or JS. 

Much appreciate any feedback!

Thanks in advance.