The phrase "almost entirely missing" is correct and usable in written English.
It can be used to describe something that is largely absent or lacking, but not completely so.
Example: "The report was submitted, but the data section was almost entirely missing, making it difficult to assess the findings."
Alternatives: "nearly absent" or "mostly lacking".
But the putt slid to his right, almost entirely missing the hole.
Bentley's insights are almost entirely missing from political discussion these days.
It was this context that was almost entirely missing from the justices' questions to the university's lawyer.
That sort of appeal to consumers' hearts as well as wallets is almost entirely missing from the mass housing market.
The thing that has been almost entirely missing from the Pacifica's Met residency thus far is new work, which is a major part of its repertory elsewhere.
But the heart of the matter, the thing itself, the people who perform it and have it and go to jail to oppose it, is almost entirely missing.
They almost entirely missed all the other guests who arrived, jostling for attention, but falling too far short of Ramsay's follicles to get a look in.
The common mistake often made is to evaluate how effective a hack event was by exploring the prototypes it generated, but this almost entirely misses the point.
In addition, she says, there is a hugely important area that is almost entirely missed by the blueprint: the children's emotional health.
The ever-changing contradictions of language and of character are at the core of "All's Well," but Daniel Sullivan's well-staged, crowd-pleasing production (at the Delacorte) almost entirely misses them.
WHILE French restaurant and country cooking have been thoroughly examined by American home cooks, somewhere between the two styles lies a branch of cuisine that has been almost entirely missed: France's bar and cafe food.
