Protests began in late May against the planned construction of a luxury hotel linked to Trump's daughter Ivanka and her husband Jared Kushner in a nature reserve in Zvernec, on Albania's southwestern coast.
For the second time this week, crowds gathered outside parliament to confront lawmakers and block entry to the building.
Lines of riot police pushed them back, leading to clashes and arrests, according to AFP journalists at the scene.
Police used tear gas, pepper spray and water cannon to break up the crowd, and some protesters tried to push through lines of officers.
Nine officers were injured by objects thrown by protesters, police said, but did not confirm arrest numbers.
Local media reported that as many as 20 had been detained.
People were also seen smashing the windows of an empty police car in a nearby street as the crowd was pushed away from area.
On Tuesday, six people were arrested when demonstrators threw eggs at lawmakers' cars.
The violence is a marked contrast to the overwhelmingly peaceful daily gatherings that have drawn thousands to the streets since the movement began.
The planned resort was first unveiled in 2024, but the latest wave of protests began after barbed-wire fencing and bulldozers appeared on beaches in late May.
Opposition to the project has become a flashpoint for anger over perceived corruption, with protesters calling for Prime Minister Edi Rama to step down over what they describe as a lack of transparency.
I was never a fan of the Lemmy developers, who engage in a... concerning amount of genocide and atrocity denial. In fact, I didn't want to swap to Lemmy.world to begin with - I originally picked Kbin despite Lemmy fitting my aesthetic preferences better. But when Kbin went down permanently, I wanted to move all my comms quickly so they didn't die, and Mbin's main instance at the time was... not federating well.
So when Piefed started to become stable, I saw an opportunity to move away from the Lemmy software, whose devs were constantly asking for money even on non-ML instances (as is normal and is necessary for software development - but again, that's exactly why I wasn't comfortable with Lemmy. You're either a free-rider or helping support the ideals of the ideologically repugnant). Rimu seemed reasonable in my brief chats with him at the time - and I still don't think he's unreasonable, per se, just with very... core disagreements about what direction Piefed should be going (ie the notion that 'power users' are undesirable and should be limited) and what that will lead to, especially the aforementioned enshittification of my own, personal experience.