A truce agreed on Friday held through the night, an AFP correspondent reported, and no gunfire was heard in the mainly Kurdish city, where control is split between Kurdish militia and the Syrian army and its allies.
The army and the Kurds have coordinated on security in Hasakeh province against Islamic State jihadists, but tensions have built up between the sometimes rival authorities.
The fighting in Qamishli began on Wednesday with a scuffle at a checkpoint and was a rare outbreak of violence between the two sides.
Government officials and Kurdish representatives met at Qamishli's army-controlled airport on Friday and agreed to observe a truce until a lasting settlement to the dispute is reached.
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"There will be a new meeting today (Saturday) at Qamishli airport," a senior security source in Damascus told AFP.
"They will discuss several points, including an exchange of fighters held by each side and the Kurds handing back control of the neighbourhoods they took from the regime," the source said.
The army and its militia ally, the National Defence Forces, control Qamishli airport and parts of the city, as well as parts of the provincial capital Hasakeh to the south.
Nearly all of the rest of the province is controlled by the People's Protection Units (YPG), who have declared an autonomous region across the mainly Kurdish northern areas they control.