Under house arrest for shipping oil from Venezuela in breach of sanctions, Artem Uss fled to Russia last month.
Several leading Israeli high-tech companies have threatened to pull funds or relocate from the country if the reforms pass.
Since the new government is preoccupied with the judicial reform initiatives, small businesses have been forgotten, according to Roi Cohen, head of Lahav.
Both US military officers and Iranian officials confirmed several Iranian drones and vessels attacked the ship.
The suspect's detention joins four other arrests made by Israel Police in connection to the Tel Aviv shooting incidents.