WordNet sense 1 (cut off or left behind):

stranded, marooned

WordNet sense 2 (marked by separation of or from usually contiguous elements):

disjunct

WordNet sense 3 (being or feeling set or kept apart from others):

detached, separated, set-apart

WordNet sense 4 (under forced isolation especially for health reasons):

quarantined

WordNet sense 5 (separated or isolated from others or a main group):

unintegrated

WordNet sense 6 (not close together in time):

stray

WordNet sense 7 (remote and separate physically or socially):

apart, obscure

WordNet sense 8 (not joined or linked together):

unconnected