Bad day for Maybin in Colombia
The Ulsterman slipped to tied 54th on two-over par after a disappointing four-over par 75 at Bogota Country Club.
Seven behind starting the day, Maybin got to three-under after a birdie at the third.
But he then dropped five shots in a five hole-spell to finish 13 strokes behind Holland's Will Bessling.
Bessling hit a 69 to lead by two shots on 11-under par from former Irish Amateur Open winner Antti Ahokas of Finland and Dane Mark Haastrup.