Unwanted means not wanted by anybody. Unwanted attention, unwanted gifts, unwanted advice.
It says nothing about the thing's quality, only about whether it was asked for, which is what makes unwanted attention such a precise phrase — the problem is the wanting, not the attention. Unwanted differs from unwelcome, which describes the reception. Note that the un- attaches to the participle, not to want.
1adjectiveunwantedNot wanted by anybody.
“She took her unwanted clothes to the charity shop.”
unwanted is a quality of not being desired.
From un- + wanted.
Etymology from Wiktionary, CC BY-SA