Will it be more difficult to be approved for a TN visa after almost getting a green card previously?

I’m a Canadian software engineer who previously lived in the US on an L1B, and was let go from that job during the Adjustment of Status step of my employment-based green process. I returned to Canada to meet the 60 day grace period requirement at that time, and to continue my working life.

Since applying for a green card is indicative of “intent” to immigrate, would a potential TN visa application with another employer be more difficult to get approved in the future than if I never applied for a green card previously? (since TN is not a “dual intent” category)

Answer

You are correct. Since the TN is a “single intent” status, your applying for a green card could result in your TN being denied.

Applying for a green card could result in your TN being denied. Although, it makes no sense you departed the US if AOS was pending.