unsolicited (adj.)

• abandoned
• arbitrary
• autonomous
• deserted
• discretional
• discretionary
• disregarded
• elective
• free
• gratuitous
• ignored
• independent
• missed
• neglected
• nonmandatory
• optional
• overlooked
• self-acting
• spontaneous
• unasked
• uncalled-for
• uncared-for
• uncoerced
• unconsidered
• undone
• unforced
• uninfluenced
• uninvited
• unlooked-for
• unprompted
• unrequested
• unsought
• untended
• voluntary
• volunteer
• willful