"deemed unrealistic" is correct and usable in written English.
You can use it when you want to express that something was judged to be too difficult or impractical, and therefore unlikely to happen. For example, "The proposed plan to build a bridge across the bay was deemed unrealistic due to the high cost and labor."
If that is deemed unrealistic for some parts of a fashion magazine, some transparency (and not the kind that has to do with gossamer fabrics) is needed.
Greece's colossal debt burden weighs on the economy, while creditors' demands for high budget surpluses are deemed unrealistic by many economists.
But Fuld had been slow to grasp the severity of the firm's plight, and Paulson was frustrated that Fuld kept insisting on what Paulson deemed unrealistic terms, including too high a price.
This is because something like it had never happened and the chance of it happening was so wildly remote (requiring the coming together of a series of highly improbable events), that it would have been deemed unrealistic given the above methodology.
Adding to doubts about the prospects of Galilee development, a proposed expansion of the Abbot Point coal port in Queensland, which all five Galilee projects planned to use, was scaled back by the state government in May because it was deemed "unrealistic and undeliverable".
Such an assumption is deemed unrealistic because usually marginal utility of income is assumed to decrease in income.
Was an artfully draped bedsheet deemed too unrealistic?
Voters were asked whether the Tsipras government should accept the terms presented by the country's creditors (aka the troika) for another bailout, terms that were deemed wildly unrealistic, counterproductive, and dangerous by some of the world's leading economists, including Joseph Stiglitz, Jeffrey Sachs, Thomas Picketty, Amartya Sen, and Paul Krugman.
However, described as a form of temporal imperialism [47] 'realistic' views of the future displace what are deemed as unrealistic alternatives - closing the future as a space for projecting a range of fears, hopes, and calls for another world [48].
If ever these two corrections resulted in a negative estimated inspiratory effort, the negative value was deemed physiologically unrealistic, and a value of zero was instead assigned.
But the prime minister, Jose Maria Aznar, was irked at what he deemed Morocco's unrealistic negotiating position.
