how to remove one of the managed host sps from cluster ?

Dears

we have 3 sps that joined to spp cluster (primary and replica).

1 sps with central management and search master role.

2 sps with managed host and search minion roles.

my question:

is there any way to remove 1 sps with managed host and search minion role ?

Or

if one sps had problem , how to force connections pass through healthy sps and bypass troubled sps ?