Question

I was recently hired for a job and then dismissed within a few weeks.
I plan to start looking for work again, and I’m concerned that if I mention the quick dismissal in a job interview, the employer won’t be interested in hiring me.
So the question is: may I conceal this fact, and especially—if I’m asked what I did since finishing my previous job, may I say that I looked and didn’t find a suitable place, without mentioning that I also worked and was dismissed during that time?
I should add that, to the best of my understanding, and also based on the feedback I received from people who worked with me, the dismissal was not due to any particularly poor conduct on my part, but rather to especially difficult circumstances that I wasn’t able to handle. So it does reflect a certain weakness on my part, but not as severely as it might appear.