Mo Marley’s side were beaten 2-1 by Nigeria in their final group match, following successive 1-1 draws with South Korea and Mexico which didn't prove enough to see England through to the knock-out stages.
Everton forward Parris broke the deadlock in Edmonton, but Loveth Ayila and Asisat Oshoala responded for the Africans to send the Young Lions home early.
Parris said: "We’re obviously very disappointed.
"Nigeria gave us a tough game. We tried our best and gave it our all until the 94th minute.
"The girls can go away and be proud of what they’ve done. I’m proud of every one of my team-mates.
"We are a young squad compared to a lot of the other teams in this competition and we gave it everything."
She continued: "Our backs were against the wall a bit after the scored.
"We were so confident with how we were playing before that, maybe we dropped off a bit and invited the pressure. Perhaps we showed a bit of vulnerability and they took advantage."
Parris has been prolific for her country at youth level, scoring 22 goals in 40 internationals, and is now too old to appear at the next U20 World Cup in 2016.
But she believes England are in good hands with the younger players who are still eligible for that tournament.
She added: "A few of this squad can go again at the next World Cup. We have got some really talented players coming through and they will definitely learn from this experience."
"Canada is a lovely place and we were made to feel welcome everywhere we went.
"We really embraced the whole occasion but unfortunately we came up just short."