Not welcome or wanted: uninvited guests. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "uninvited" in a sentence
"Unfortunately when the previous administration marched in uninvited, a can of worms was opened up."
"Evangelist Franklin Graham was uninvited from a National Day of Prayer event at the Pentagon for calling Islam an "evil" and "wicked" religion, comments he made back in 2001."
"This little SOB better be uninvited from the rest of the entire convention."