A person who is received in a particular environment or event, often implying a level of uninvitedness or discomfort.

अनचाहा व्यक्ति

English Usage: The unwelcome guest lingered at the party despite attempts to ask him to leave.

Hindi Usage: अनचाहा व्यक्ति पार्टी में रुका रहा, भले ही उसे जाने के लिए आग्रह किया गया।