pale into insignificance

pale into insignificance and
fade into insignificance
(if something pales into insignificance, it does not seem at all important when compared to something else) — терять (всякое) значение, переставать иметь какое-либо значение в сравнении с чем-л; ~ меркнуть в сравнении с чем-л, бледнеть в сравнении с чем-л; ничто в сравнении с чем-л

Example 1: When your child's ill, everything else pales into insignificance. (Cambridge Idioms Dictionary)

Example 2: With the outbreak of war all else fades into insignificance. (Cambridge Idioms Dictionary)

Related vocabulary:
[can't hold a candle to sb]
[pale in comparison]
[not a patch on sb]
[a notch below]
[knock spots off sth]
[в подметки не годиться]
be no contest