fall by the wayside
US /fɔl baɪ ðə ˈweɪ.saɪd/
UK /fɔl baɪ ðə ˈweɪ.saɪd/

1.
tomber à l'eau, échouer, être abandonné
to fail to continue with an activity or to be unsuccessful in achieving something
:
•
Many good ideas fall by the wayside due to lack of funding.
Beaucoup de bonnes idées tombent à l'eau faute de financement.
•
He started a business, but it soon fell by the wayside.
Il a lancé une entreprise, mais elle a vite échoué.