We planned to take a trip to Asia in three years or less.
The modifier "in three years or less" was misplaced.
- A misplaced modifier is a word or phrase which is separated from the subject it modifies, thus making the sentence syntactically incorrect as well as illogical: I found the stained man's hankerchief.
- A squinting modifier creates ambiguity in a sentence through its placement, by making it unclear which part it modifies (the one that comes before it or the one that comes after it): Combing your hair softly detangles it.
- A dangling modifier gives an information without clearly stating its subject in the sentence. It often consists of "having + past participle" or "being + past participle" constructions, like: Being tired after the show, going straight home was the best plan.