Demosisto has declared that it will no longer be a political party, but a "civil political group".
On the second anniversary of its establishment last night, Demosisto says it no longer sees a future in local elections.
It says its decision follows after a series of setbacks, including the disqualification of its former chairman, Nathan Law from being a lawmaker, and the barring of its member Agnes Chow from taking part in March by-elections this year.
The group says it will now focus on community work, and working to prevent the passage of Article 23 national security legislation.
Demosisto was formed in 2016, emerging from the student group Scholarism, and its co-founders took active roles in the 2014 Occupy protests.