The military junta tried to prevent all commemorations of deaths and injuries resulting from its murderous 2010 crackdown. The photos below are of Rajaprasong, where the military and police closed off public areas, fearful of commemorations.
Despite this, there were small events, as shown here:
Another commemoration was disrupted by official thugs.
Update: Khaosod also has a story on the junta anti-remembering. But even they have faulty memories, forgetting who was army boss at the time.
The main point is that on 19 May 2010, then prime minister Abhisit Vejjajiva and his deputy Suthep Thaugsuban ordered then-army chief General Anupong Paojinda to clear out remaining protesters. General Prayuth Chan-ocha led the operation. In it, 41 civilians died on that one day, and one soldier was killed by friendly fire. Another 60 had dies in events leading up to the clearance over April and May. Then, as the report succinctly reports it:
Four years later on May 22, 2014, Prayuth staged a coup to seize power from the elected government and installed himself as prime minister.