"for seemingly no reason" is a grammatically correct phrase and can be used in written English.
It can be used to describe an action or event that appears to have no logical or apparent cause. Example: The main character suddenly burst into tears, for seemingly no reason.
Hundreds of thousands have been killed for seemingly no reason.
I remember visiting friends' homes where relatives had disappeared for seemingly no reason".
The fault in Apple's latest iPhone model also causes phones to turn off for seemingly no reason.
Gary Ryan Cartwrightt) is a high-functioning autistic twenty-something, who waves his hand in the air for seemingly no reason, and makes random, sometimes inappropriate observations.
"Then suddenly for seemingly no reason at all, in the last few days it picks up again," said Molyneux, although he proceeded to give a reason.
When anxiety occurs for seemingly no reason or in an exaggerated manner in response to relatively innocuous stimuli and disrupts a person's life, an anxiety disorder may be diagnosed.
Its title contains the word "APP" in uppercase for seemingly no other reason than because some phones have apps on them now.
An untrustworthy youth called Wilf tags along in the latter stages for seemingly no other reason than to provide a counterpart to Bunyan's personification of Ignorance.
Indeed, throughout this tome, Baker doesn't so much drop famous names as fire them at you with a cannon for seemingly no other reason than to amuse and entertain with top‑notch anecdotes.
There are too many good apps that get rejected for seemingly no good reason at all.
But I'm not giving anything away (that the trailer doesn't) by saying it's the story of a relationship that ends for seemingly no good reason.
