If you do lose three games, you will have to restart your Trails of Orisis again. In addition to this, you will have to form a team yourself as there is no matchmaking system in Destiny 2 Trials.
Destiny 2 Trails of Orisis Rewards

Each week the Trials of Orisis take place on a different map, and rewards get reset at 10 AM PT/1 PM ET. Here is the list of rewards you will be getting this week from 9th July to 13th July based on the number of matches you win:
Trails of Orisis Map: Javelin-4
Rewards
- 3 wins - Pyrrhic Ascent Vest, Plate, Vestment (Hunter, Titan, and Warlock chest)
- 5 wins - Eye of Sol, Kinetic sniper rifle
- 7 wins - Pyrrhic Ascent Cloak, Mark, Bond (Hunter, Titan, and Warlock class item)
- Flawless - Shayura’s Wrath (Adept), Void submachine gun - random Adept mod
In case you are confused with the term Flawless, you achieve this when you win seven matches in a row. The teams having a Flawless run can go to the Lighthouse social space to earn additional rewards like a special emblem along with a special armour glow for all the Trials of Osiris armour that lasts for the whole week.
We have plenty of more content waiting for you on the Destiny 2 dedicated section, so head on out there to see all sorts of guides, news, and more.