Camarda, born in 2008, put pen to paper after AC Milan exercised a buy-back option to bring him home following a season-long loan at Lecce, where he made 23 appearances and scored once, in a campaign disrupted by a shoulder injury that kept him out for three and a half months.
RedBird owner Gerry Cardinale, who controls Milan, said the renewals reflected his long-term vision for the club.
"Our long-term commitment to renewing the contracts of Camarda and Comotto is fully in line with the vision I have outlined for the club since becoming its owner. We will prioritise players who have come through our academy, support them through their development, and maximise their potential so they can contribute to the team's success on the pitch," Cardinale said.
"Wearing the Milan shirt must be a privilege. That is exactly what we want to focus on, making sure we have an organisation capable of developing players who embody Milan's values and what the club will represent in the years to come.
"Both Camarda and Comotto embody what it means to be Milan: we play to win, and they are winners."
Camarda shared his own reaction on social media following the announcement.
"Together again! Thanks to the club for the trust and to you fans for the affection. Ready to give my all, as always. Wearing this shirt is special, doing so for the years to come is a dream that continues. Forza Milan!" he wrote.
Elsewhere, Milan are working to move on striker Santiago Gimenez, who has struggled to make an impact since joining the club and is now attracting interest from Lazio as Gennaro Gattuso looks to strengthen his attack following an injury to Lorenzo Lucca. Milan want a permanent sale in the region of β¬25m, a price Lazio consider high given Gimenez failed to score in Serie A last season, and have instead proposed a loan with an obligation to buy, leaving the two clubs some distance apart.
Reflecting on his difficult spell at Milan and his World Cup experience with Mexico, Gimenez struck a defiant tone.
"Sometimes we want results to come immediately, but that's not how football works. You can score a goal while playing badly, but in the long run that won't help you. If instead you go through a moment without goals but keep working hard, the reward comes. When you step onto the pitch it's a war, a football war.
"You have to put on an angry warrior's face, like a Roman emperor: your opponent has to see you as strong, because if they see you cry you're just giving them energy. The World Cup made me even prouder to be Mexican and lit a fire inside me," he said.