BANGKOK, April 29 (Reuters) - Thailand's customs-based exports fell 10.9% in March from a year earlier, the commerce ministry said on Monday, weaker than analysts' expectations.

The reading compared with a forecast for a 4.5% year-on-year fall for March in a Reuters poll, and followed February's 3.6% rise.

(Reporting by Kitiphong Thaichareon, Satawasin Staporncharnchai and Chayut Setboonsarng; Editing by John Mair)