Roses prefer a full day of sun. Give roses at least 6 hours of direct sun a day. Morning sun is especially important because it dries the leaves which helps prevent disease.
In general, roses do poorly in shady conditions. Plants bloom less, are leggy, and are more likely to get diseases. However, many Hybrid Musks and some Albas can tolerate partial shade. A few other varieties including the Floribunda “Gruss An Aachen” can be planted in partial shade.
Other roses that may grow in partial shade are the Rugosas, Iceberg(FB), Zephirine Drouhin (Bourbon), Souvenir du Docteur Jamain(HP) and Madame Plantier.