Was Captain America Winter Soldier based off this movie?

Well, much depends on what side one is on . . . somebody wanted Turner eliminated . .. they failed in their mission (or did they?) earlier, and now had to go through a great deal to find him and finish the task . . . he may be the good guy to us, but the them he most certainly was the bad guy . . .and anyone who dares to get in the way may themselves be eliminated, and may not even know why . . .

The Russo brothers admit that this film was a major inspiration for the script and the casting of Robert Redford as the main villain.

They share a basic plot outline;

Steve Rogers and Joseph "Condor" stumble upon information about their own government possibly involved in shady activity.

They are framed for the murder of a colleague (Sam/Nick Fury).

They go on the run with a female ally (Kathy/Natasha).

They evade a master assassin (Joubert/The Winter Soldier).

Their superior is clearly malevolent (Higgins/Pierce).

But that's, as I said, a very loose comparison.

Both are great films in their own right. At the end of the day, 3DotC is a quiet spy thriller and CA:TWS is a balls to the wall action thriller.

The writers and directors said the paid homage to this film. It's great to see a modern film that takes this approach to film making. Both are superb films, new and old.

We've come full circle. Both movies are good ones and I own both of them. Reflections of their times. Yes I said that about a superhero movie.

It's a huge rip off. I wonder why there was no backlash like there was with Joker for copying Taxi Driver and the King of Comedy.

I think it's more than safe to say that THREE DAYS OF THE CONDOR was a major inspiration for WINTER SOLDIER. I actually saw the Marvel movie before watching CONDOR and when I finally got around to seeing the earlier film, I was like, "Hey, this is familiar!"