The Nerazzurri had been unbeaten under this Coach and in joint third place, but fumbled a 1-0 lead to lose 3-1 at the Tardini.
"More than mistakes by individuals, I would talk about three fatal minutes that cost us dearly," said Stramaccioni.
"However, three minutes will not ruin what we are doing. We were unlucky and there is a lot of hunger to make up for it because we had a good first half and the whole team made mistakes after the break, not just individuals.
"Parma deserve praise. From Sunday we want to get back to winning ways in the derby. As for the Champions League, we must win all our remaining matches and then see where we are.
"We made life difficult for ourselves and now want to make up for it. Sunday is the right game for that task."