Yes, every remark has a certain impact, whether positive or negative.
You should expect questions about this remark in interviews and have some good explanation ready at hand.
You should also learn about the meaning of relieving letters in your country. In some countries they have little meaning while in others there is a secret language involved. In Germany, for example,
He always tried to deliver good results.
is a very bad remark. It means, you tried but were not able to actually produce good results. If this kind of secret language is typical in your country, this remark is even worse than it reads.
Continueing in your carrer, you should avoid including this relieving letter in any application at all cost. Only give it to an employer if he asks for all previous relieving letters.
I'd say you are lucky they didn't choose a harsher phrase. Not adding value to a company in the first 3 month might be something you can explain.