separable controversy

noun

sep·​a·​ra·​ble controversy

ˈse-pə-rə-bəl-

: a separate and independent claim or cause of action that by itself is removable to the federal courts even though it is joined with others that are not removable

Note: If a case involves a separable controversy, the entire case may be removed and determined as a whole, or the court may remand those matters that were not removable and determine the rest.