Son will be on the pitch before kick-off for a ceremony to official bid farewell to the club. He will also be handed the microphone to directly address supporters.
He said: “When I announced my difficult decision to leave Spurs in the summer, it was in Korea and I never got a proper chance to say goodbye to fans at the stadium.
“Now I am so happy because I am going to come back to London on 9th December, for the Champions League match, and be able to tell the Spurs fans in person just how much their support and love over 10 years has meant to me and my family. It will be emotional, but it's important for me and the Club that this happens.”
The new MLS campaign does not start until February and there have been suggestions that Son could secure a short-term loan move to a European club to maintain his fitness.
He said: "I've never spoken to any club about a winter move. Such talk is simply untrue. For me, showing respect to my club and giving everything where I play — that's what matters most. That won't change.
"I won't leave LAFC this winter, or ever, while I'm here. I respect this club deeply. As long as I'm wearing this badge, there will be no such thing as a loan or a move. Never.
"I know fans get confused when rumours fly, but those stories aren't true. And honestly, it might be disrespectful to my team to even talk that way. I love this club, and I have huge respect for everyone here."