Noakes failed a concussion test yesterday morning and will have another one today. Kirwan's other option at first-five is Ihaia West, a 22-year-old from Hawkes Bay who has been in the squad for only a week following Baden Kerr's withdrawal with broken fingers.
It is clear that Marshall, who replaced Noakes late in the first half and struggled with his kicking game and leadership of the backline, is no longer seen as an adequate first-five cover.
Kirwan would not be drawn on the player's immediate future, preferring to concentrate on what he wants his side to bring against the Waratahs who will include the dangerous attacking threat of Israel Folau at fullback.
Watch: Rugby Highlights: Hurricanes 39 Blues 20
The first thing they have to find is a desire to impose themselves. Against the Hurricanes they were far too passive, with Kirwan agreeing they conceded too easily.
"All of us need to look in the mirror," he said. "There are a couple of things not going our way and we're not staying in the fight. Anyone who puts the Blues jersey on needs to stay in the fight right to the very very end. I don't think that happened the other night.
"We were outplayed against the Brumbies but we were still trying our guts out at the death. I think the other night was the first time in a long time that I saw the team a little bit lost. Sometimes that is perceived as not having passion, I don't agree with that, but we need to get out and put some pride back into our performance."
Kirwan said the inclusion of halfback Piri Weepu was a possibility after his recent health scare and heart surgery.