Following a stellar college career with the Nebraska Cornhuskers, Suh was taken second overall by the Lions four seasons ago.
The defensive tackle is now in the midst of contract negotiations with his team, and although talks are "civil and productive" between the two parties, his appearance at organised team activities was still deemed noteworthy.
The 27-year-old told reporters: "I'm here and Detroit and I'm happy to be in Detroit. Probably a lot of you guys don't know, I could have gone elsewhere when I was drafted.
"I had that decision in my hands. I chose not to take it because that's just the way I saw it at the time. There's many ways to do things [during the Draft]. You can drop down, you can move up. But like I said, that's water under the bridge.
"The coach (Jim Caldwell) has said we're not in a rebuilding year. We're here to win a championship and that's exactly what I intend to do."
Should Suh and the Lions not reach an agreement, the three-time Pro Bowler will be an unrestricted free agent this time next year.