Patricia Chale started as Director of the Scottish Catholic International Aid Fund (Sciaf), on 1 December 2012.
But in a statement the charity said: "Patricia Chale's employment with Sciaf will end on 2 May...For the time being Sciaf will be led by the members of the senior management team working together."
Before taking up her Sciaf role Ms Chale had been executive director of Caritas Westminster, a newly created social action arm of the Archdiocese of Westminster, for seven months.