In his Instagram post Ramsey thanked “the Mexican people for their kindness and generosity and making me and my family feel so welcome in Mexico City.”
He said: “I also want to give a big thanks to the manager, the coaching staff and particularly the medical staff for helping me through what was a difficult time with injuries.
“However with their help and a lot of hard work I was ready and match fit for the remaining games and I was looking forward to giving my best to the Pumas.
“Unfortunately my contract was terminated which was a surprise and obviously disappointing. Therefore I had no choice but to come home to Wales.
“Thank you again for all the support through the time we spent in Mexico. It’s a beautiful place and we will definitely come back to visit soon.”
BBC Sport Wales have approached Pumas for comment.
