The phrase "almost breakdown" is correct and usable in written English.
It can be used to describe a situation where something is on the verge of failing or collapsing but has not yet fully done so.
Example: "After hours of intense negotiations, the team was experiencing an almost breakdown in communication."
Alternatives: "near collapse" or "impending failure".
I love lists: last week's almost-breakdown over losing my current version of Wunderlist proved that point.
"There appears almost a breakdown between the two sides".
Amid an almost complete breakdown in relations between the government and the corporation, the BBC's chairman, Gavyn Davies, and its director-general, Greg Dyke, resigned.
And then towards the end of the century, there was this enormous, almost global, breakdown ranging from Russia to [South] Korea, Indonesia and Argentina.
Many do, because excellent teachers work themselves almost to breakdown, slaves to the dreaded music hubs, often on zero-hours contracts, because they know music is worth it.
Given the events of last week and the almost complete breakdown in relationship between the government and the crossbench, I would doubt now whether it would go through.
Both waves of unrest, nevertheless, seem to be rooted in similar problems: acute unemployment, severe social deprivation, and the almost total breakdown in relations between police and certain sections of society.
The book has already sold half a million copies in Norway alone; Knausgaard's father's family have broken with him, his brother won't speak to him, and his marriage suffered an almost complete breakdown as the result of his having written it.
They have two drivers both determined to win the championship, but an almost complete breakdown in trust between them.
A doctor who returned to help treat victims of the Aleppo siege in Syria gives a gloomy assessment of the almost complete breakdown of medical treatment in the city.
