Really? Where is this documented? I would like to know, because it directly contradicts the following:

Erasmus never broke his vows as a priest and died under orders.
W. E. Campbell, Erasmus, Tyndale and More. (London: Eyre & Spottiswoode, 1949), p. 272.

“He tried to remain in the fold of the old [Roman] Church, after having damaged it seriously, and renounced the [Protestant] Reformation, and to a certain extent even Humanism, after having furthered both with all his strength.” Johan Huizinga, Erasmus and the Age of Reformation (Tr. F. Hopman and Barbara Flower; New York: Harper and Row, 1924), 190.

On May 31, 1535, one year before Erasmus' death, Pope Paul III wrote Erasmus a letter thanking him for his offer of help in reforming the Catholic Church and promising Erasmus that he would be remembered with gratefulness.
Robert Blackley Drummond, Erasmus, his life and character as shown in his correspondence and works (Smith, Elder & Co., 1873), 334

Less than a year from his death. . . "It appears from the statement of Beatus, that the provostship of Deventer, a tolerably lucrative office, was pressed upon him, but declined, Erasmus thinking that he had enough to carry him to the grave."
Robert Blackley Drummond, Erasmus, his life and character as shown in his correspondence and works (Smith, Elder & Co., 1873), 334

I can find no documentation saying Erasmus renounced his office or left the Catholic church at any time. On the contrary, he was commended by the Pope near the end of his life, and was buried with honors in a Catholic cathedral.