Washington (CNN) - Arizona Republican Rep. John Shadegg is retiring from Congress, a GOP source confirmed to CNN Thursday.
The story was first reported by The Rothenberg Political Report.
Shadegg, who was first elected in the 1994 GOP landslide, is the third Republican to announce retirement plans, following Rep. George Radanovich of California and South Carolina Rep. Henry Brown.
It's not the first time Shadegg has decided to call it quits: He announced he would not run for re-election in Feb. 2008, but was encouraged to run again by his colleagues.
Shadegg's district is reliably conservative. In 2008, John McCain won the district over Barack Obama by a 56-42 margin.
UPDATE: In a statement, Shadegg called his decision "particularly hard" but said "it is time for me to take my life in a new direction and to pursue my commitment to fight for freedom in a different venue."
"As the Obama Administration and Speaker Pelosi grow further and further out of touch with average Americans, evidence continues to build that 2010 will be a record year for Republicans running for Congress," he said in the statement. "And, I am extremely confident that the people of the Third District of Arizona will elect a solid conservative."
UPDATE 2: Rep. Chris Van Hollen, the chairman of the Democratic Congressional Campaign Committee, said he is pleased Shadegg finally followed through on his original retirement plans.
"Now we are assuming that he really is retiring," Van Hollen laughingly told CNN's Dana Bash.
Van Hollen noted that 14 House Republicans have announced plans not to run again in 2010 either to retire or seek higher office. Just 11 House Democrats have done so, he said.