A suspensionist, in regards to spirituality and religion especially, is someone who suspends judgment. In other words, they refrain from believing or disbelieving and accept that any particular answer which they might lean toward could be wrong so they sit completely neutral, though they usually would consider any new information which could alter the schema.
A suspensionist is someone who believes that capital punishment should be temporarily halted or suspended, often to reassess its effectiveness or ethical implications. This position is distinct from outright opposition to capital punishment.