The Cardinals selected Bucannon in the first round of the 2014 NFL Draft out of Washington State as a replacement for Adrian Wilson at strong safety, following his departure at the end of the 2012 season.
"[Deone has] only got one problem, he is so much a perfectionist," Arians told the team's official website. "It is paralysis by analysis right now because he wants to do everything just perfect.
"Even Tyrann [Mathieu] told him, 'Just play.' You can't play perfect all the time. But you do love that about him."
Bucannon recorded 114 tackles and six interceptions in the 2013 season.