He played six straight games for Carlton between rounds 18 and 23, averaging 11.8 disposals and 3.8 tackles and kicking four goals, but his contract wasn't renewed.
Deluca told SEN radio that Carlton had indicated he would be eventually signed for 2020 when he was initially drafted.
"Yep, 100 per cent (thought he had a spot for 2020). I was pretty devastated and shocked, just because I thought I was in a better position than I found out to be," Deluca said.
"I would have loved the opportunity to get a pre-season in and really had a good crack at it next year, even if it was just a year contract. I was pretty flat. They were pretty reassuring it wouldn't be, so I was pretty flat to hear when that result came back and circumstances had changed."
The recruitment of a couple of high-profile small forwards frustrated Deluca, who felt he was forced out and wondered why he was drafted in the first place.
"That was sort of the conversation (between himself and Carlton) pre-trade, and then it turns out they were going for three or four forwards," he said.
"I understood that, but what I was thinking was along the lines of, 'you would have had an idea you were going for those players earlier in the season,', and I didn't understand why I was picked up in the first place if that was the case."
Deluca is now leaning towards staying in Victoria and playing VFL in the hope of a third AFL club throwing him a lifeline.
"I'd never say no to an AFL contract, but I'd probably want a bit more reassurance that it wouldn't end like this. It's hard coming over from Perth, it puts your life on hold," Deluca said.
"In terms of your work opportunities, I wouldn't want it to have a big effect on that. But of course, I'd take a contract if it was thrown at me."