A little perplexing...
It is in the Rosaceae, but:
- not almond - flowers too white
- not bullace - leaves not serrated
- not hawthorn (not even simple-leaved ones) - leaves not right
- not Amelanchier - petals wrong
- not several others
It might be an apple (Malus), but let me ask some queations...
How tall it is?
Single stem or multple stems?
Does it have any thorns?
Please check the bases of the leaves: is there a pair of little glands (perhaps red) on each side where the leaf blade meets the leaf stem? (indicative of Prunus)
If you rummage in the herbage or soil below the shrub, can you find any fruits (even if shrivelled or part-decomposed).
Is it planted in a border or does it in any way lead you to think it might be of horticultural origin, as opposed to wild origin?
Are you sure it doesn't have a label?!
Many thanks for taking the time and trouble to reply. I've attached further photographs which may make for clearer identification.
Height approx 2.5 feet tall
Can't see any glands on the plant upon leaf blade meeting the stem.
No fruits apparent in soil.
Plant doesn't have a label!
Looks to me like a species of Lilac, were the pictures taken this year and are you in the south of the country?
I have species of lilac similar to yours but they are not in flower yet. Maybe this will give you a starting point for further investigations!!