Wilders said Thursday, "I am here ... against my will and the least I expected was that you would give me a fair hearing."
Wilders' lawyer says the judges showed they weren't impartial by rejecting his request to call more witnesses and carry out further investigations in the appeal case.
A separate panel of judges will now consider Wilders' request before the case can continue.
Wilders was convicted in December 2016 but given no punishment for comments before and after 2014 municipal elections that judges deemed insulting to Moroccans.
Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.