This one detail should not make the authorities unduly suspicious.

He didn't want to be unduly suspicious, but there was something ominous about this unruly advance across the sky.

They asked me a few questions but were not unduly suspicious.

They have been unduly suspicious of us.

But they would have had no reason to be unduly suspicious.

Does this reaction to a skillfully written, strongly delivered speech sound unduly suspicious?

If they're in control, they won't be unduly suspicious.

"I am widely considered to be unduly suspicious of everyone and everything," Kazul said in a dry tone.

This entire mission had made him unduly suspicious.

He told himself he had an unduly suspicious mind.