Colon was placed on the list Monday to visit his mother in the Dominican Republic, who they said is "critically ill."
The team optioned right-hander Gonzalez Germen to Triple-A Las Vegas to make room for Colon.
Colon is listed as the probable starter for Sunday's game versus the Dodgers. The 41-year-old is 11-10 with a 3.85 ERA this season.
The Mets are in fourth place in the NL East with a 60-68 record.
- Molly Geary